FAQ

No. The majority of cardiac arrest survivors do not receive an ICD (implantable cardioverter-defibrillator). Whether an ICD is appropriate depends on the underlying cause of the cardiac arrest, the condition of the heart, and a range of clinical factors assessed by a specialist cardiologist.

For some survivors, particularly those whose cardiac arrest was caused by a shockable heart rhythm with an identifiable and treatable underlying cause, other treatments may be sufficient. For others, particularly those at ongoing risk of a life-threatening arrhythmia, an ICD may be recommended.

The decision about whether to implant an ICD is made by your clinical team in consultation with you. If you have questions about your treatment, your cardiologist or cardiac nurse specialist (CNS) is the right person to ask. You can also read more in our guide to implantable devices.

Category: Implantable Devices

This depends on the underlying condition rather than the ICD itself. Clinical thinking has shifted considerably in recent years away from blanket activity restrictions for young people with cardiac conditions, recognising that the physical and psychological benefits of exercise are significant and that unnecessarily restricting activity can do real harm to a child’s development and wellbeing.

Many children with ICDs can participate in recreational sport and even competitive sport, depending on their specific diagnosis and risk profile. Others may be advised to avoid high-intensity exertion or contact sports where a blow to the chest is possible. These decisions should be made by a specialist paediatric cardiologist with experience of exercise and inherited cardiac conditions — not by a GP or the school, and not by applying generic rules from the internet.

If your child’s cardiologist recommends restricting sport, it is reasonable to ask what the evidence base for that recommendation is, whether it applies to all sport or only certain types, and whether the guidance would change over time. A second opinion from a specialist inherited cardiac conditions (ICC) service may also be appropriate if you feel the advice is overly restrictive without clear justification.

Whatever is agreed, make sure the school and any sports coaches are aware of the plan and know what to do in an emergency.

Category: Children

Yes, most children with an ICD return to school, though the timing and any restrictions will depend on the underlying condition and your child’s recovery. Your child’s cardiologist will advise on when it is safe to return and what limitations, if any, apply.

Before your child goes back, it is important to meet with the school to share relevant medical information and agree an emergency plan. This should cover what to do if your child collapses, who is responsible for calling 999, whether a member of staff should be trained in CPR, and the location of the nearest AED. Schools in England are now required to have an AED on site.

Activity restrictions vary. Some children with ICDs can participate fully in PE and sports; others may need to avoid high-intensity or contact activities. This is a conversation to have with the cardiologist, not one to leave to the school to decide. A written medical summary from the cardiac team can be very helpful for the school to have on file.

It is also worth considering the emotional side of returning to school. Your child may feel anxious, self-conscious about the device, or worried about what peers will say. Speaking with a clinical psychologist before return, and giving your child some choice about what to share with classmates, can help significantly.

Category: Implantable Devices

Not always, but it depends on the underlying cause. If your child’s cardiac arrest was caused by a condition that creates ongoing risk of dangerous arrhythmias — such as Long QT Syndrome, HCM, CPVT, or Brugada Syndrome — an ICD is often recommended. If the arrest was caused by a fully reversible trigger with no ongoing risk, an ICD may not be necessary.

ICDs can be implanted in children and young people, including younger children, though the approach may differ from adult implantation. In smaller children a subcutaneous ICD (S-ICD), which sits under the skin without leads going into the heart, is sometimes preferred. The device and leads are also replaced as the child grows.

The decision will be made by a specialist paediatric cardiologist or electrophysiologist in discussion with you and, where age-appropriate, your child. It is reasonable to ask about the risks and benefits of implantation, the alternatives, and what monitoring would be needed if an ICD is not implanted.

If you have concerns about the recommendation, seeking a second opinion from another specialist centre is entirely reasonable and is something good clinical teams will support.

Category: Implantable Devices

Sudden Cardiac Arrest UK (SCA UK) is a registered charity supporting survivors of sudden cardiac arrest, their families, and the wider cardiac community. We provide information, peer support, and advocacy, and we connect people at every stage of life after a cardiac event.

Our website includes a comprehensive FAQ covering ICDs, cardiac arrest, CPR, driving, travel, and more. We also run an active online community for survivors, co-survivors, and those newly diagnosed with a cardiac condition.

If you would like to support our work, you can join the Friends of SCA UK programme. For a modest annual contribution, Friends help us fund new resources, reach more people, and keep the community running. Every Friend matters.

Category: Implantable Devices

A precautionary ICD is still a significant decision, and it is entirely reasonable to have questions about it. The fact that it has not fired does not mean it is not doing its job.

The device monitors your heart rhythm continuously and records any anomalies, even ones you are not aware of. It provides a level of protection and clinical data that passive monitoring alone cannot. For some people, the knowledge that the device is there also provides meaningful reassurance to both themselves and their families.

If you have concerns about whether your device is appropriate for your individual situation, those are legitimate questions to raise directly with your cardiologist. A second opinion is always an option if you feel your concerns have not been adequately addressed.

Category: Implantable Devices

A venous occlusion is a blockage in a vein, in this case typically the subclavian vein that runs beneath the collarbone, where ICD leads are commonly positioned. It occurs when the presence of the lead causes the vein to narrow or block over time.

Symptoms can include swelling, stiffness, discolouration, or a feeling of heaviness in the arm on the side of the device. It is not always immediately identified, and in some cases people are discharged from hospital without a clear diagnosis, only for the cause to be confirmed when symptoms recur.

Venous occlusion is not a common complication, but it does occur. If you experience unusual arm symptoms after ICD implantation, contact your ICD clinic promptly. Do not wait for your next routine appointment.

Category: Implantable Devices

Very. Feeling grateful and frustrated at the same time is not a contradiction. It is one of the most commonly reported experiences among people living with an ICD, and it deserves to be acknowledged rather than dismissed.

Many people distinguish between wishing they had not got the device and wishing they had never needed it. Those are two very different things. Others find the psychological adjustment takes time, particularly if the device was implanted following a sudden and traumatic cardiac event, or if it was fitted as a precaution without a clear triggering incident.

If you are struggling emotionally with your device or your diagnosis, speaking to your cardiac nurse specialist or GP is a good first step. Peer support can also be valuable. The SCA UK community connects people at every stage of life with a cardiac condition, and hearing from others who have been through the same adjustment can make a significant difference.

Category: Implantable Devices

Not necessarily. A full shock is usually noticeable and can feel like a sudden strong thump to the chest. Most people describe it as startling rather than painful, though experiences vary.

ATP (anti-tachycardia pacing), however, often works without the person being aware of it at all. It delivers a rapid burst of pacing to interrupt an arrhythmia before it escalates to the point where a shock is needed.

Some episodes of arrhythmia are also brief enough to resolve before the device needs to intervene at all, but the device will still record them. It is entirely possible to have a significant episode detected by your ICD without knowing anything about it until the data is downloaded at your clinic.

Category: Implantable Devices

An implantable cardioverter-defibrillator (ICD) is a small device fitted under the skin, usually near the collarbone, that continuously monitors heart rhythm. If it detects a dangerous arrhythmia, it can deliver a controlled electrical shock to restore a normal rhythm.

Some devices also provide pacing support and a therapy called ATP (anti-tachycardia pacing), which can correct certain arrhythmias without a full shock. ATP works silently and the person often has no awareness that it has activated.

ICDs are used both for people who have already experienced a life-threatening cardiac event and for those considered at elevated risk of one, as a precautionary measure. The device records data continuously, which your ICD clinic can download and review remotely or at a scheduled appointment.

Category: Implantable Devices

Life insurance is available after cardiac arrest and with an ICD, but it will typically be more expensive than standard rates and some providers may decline certain types of cover. The market varies considerably between insurers, so it is important to shop around and use a specialist broker where possible.

When applying for life insurance, you are required to disclose your medical history, including your cardiac arrest and any devices or conditions. Failing to disclose is likely to make any claim invalid. Insurers will usually ask for details of the event, the cause, your current medications, device type, and the results of your most recent cardiac review.

Some policies may be available at standard rates, particularly if the cardiac arrest occurred some years ago, the cause has been fully treated, you have a well-functioning ICD, and there are no other significant health conditions. Others will be offered at "loaded" (increased) premiums, or with exclusions for cardiac-related claims.

For those who cannot obtain standard life insurance, options include over-50s guaranteed acceptance plans (which do not require medical questions but typically pay a fixed sum) and specialist insurers who focus on people with pre-existing medical conditions.

The British Heart Foundation produces guidance on insurance for people with heart conditions. Specialist financial advisers experienced in this area can help identify the most suitable options.

A cardiac arrest does not mean life insurance is impossible — it means you need to look harder and possibly pay more.

Category: Cardiac Arrest

Moderate alcohol consumption is generally considered safe for most people with ICDs, but there are some important considerations.

Alcohol can affect heart rhythm. Even in healthy people, heavy alcohol consumption can trigger atrial fibrillation ("holiday heart") and, in people with certain underlying conditions, ventricular arrhythmias. For people with inherited arrhythmia conditions such as Brugada Syndrome, alcohol — particularly in large quantities — can be a recognised trigger for dangerous arrhythmias and should be avoided or very strictly limited.

For most ICD patients, the general advice is to drink sensibly and within the recommended UK guidelines (no more than 14 units per week, spread across three or more days, with alcohol-free days). Binge drinking should be avoided.

Alcohol can also interact with some cardiac medications. For example, certain antiarrhythmic drugs and blood-pressure medications are affected by alcohol. Ask your pharmacist or cardiac team about any specific interactions with your medications.

If you are unsure what is safe for your specific condition, discuss it with your cardiologist or device clinic. They can advise based on your diagnosis, your device settings, and the medications you take.

Category: Implantable Devices

CPVT — Catecholaminergic Polymorphic Ventricular Tachycardia — is a rare inherited arrhythmia syndrome in which the heart is structurally normal but specific triggers, particularly physical exertion or emotional stress, can provoke dangerous ventricular arrhythmias. These can cause palpitations, blackouts, or sudden cardiac arrest.

CPVT is caused by mutations affecting calcium regulation within heart muscle cells, most commonly in the RYR2 gene. It typically presents in childhood or adolescence and can cause sudden cardiac arrest in young people who appear otherwise completely healthy. A standard resting ECG may be normal; an exercise stress test often reveals the characteristic bidirectional ventricular tachycardia.

Treatment includes beta-blockers to reduce the risk of arrhythmias triggered by adrenaline, strict avoidance of competitive and high-intensity exercise, and in many cases ICD implantation. Some patients are also treated with flecainide.

Because CPVT is inherited, family screening is essential following a diagnosis. First-degree relatives should be assessed with an exercise stress test as well as a resting ECG and echocardiogram, as the resting ECG may appear entirely normal even in affected individuals.

Category: Cardiac Arrest

Hypertrophic Cardiomyopathy (HCM) is the most common inherited heart muscle condition. In HCM, the walls of the heart — most often the left ventricle — become abnormally thickened (hypertrophied), which can obstruct blood flow, cause the heart to pump less efficiently, and create dangerous arrhythmias.

HCM affects approximately 1 in 500 people and is a leading cause of sudden cardiac death in young people, including young athletes. Many people with HCM have no symptoms at all; others experience breathlessness, chest pain, palpitations, or blackouts. In some cases, the first sign of HCM is a cardiac arrest.

HCM is caused by mutations in genes that encode the proteins of the heart muscle, most commonly MYH7 and MYBPC3. It is inherited in an autosomal dominant pattern, meaning each first-degree relative of someone with HCM has a 50% chance of carrying the same gene variant.

Treatment depends on symptoms and risk profile and may include medication (beta-blockers, calcium channel blockers), a procedure called septal reduction therapy (to reduce obstruction), and ICD implantation for those at high risk of sudden cardiac arrest.

Family screening — with ECG, echocardiogram, and genetic testing — is strongly recommended for all first-degree relatives.

Category: Implantable Devices

Brugada Syndrome is an inherited heart condition in which the heart’s electrical system malfunctions despite the heart having a normal structure. It is caused by mutations affecting sodium channels in heart cells — most commonly in the SCN5A gene — and produces a characteristic pattern on an ECG. People with Brugada Syndrome are at risk of dangerous ventricular arrhythmias (abnormal heart rhythms), which can cause sudden cardiac arrest, most often at rest or during sleep.

Brugada Syndrome is more common in men and in people of South-East Asian descent. It may be diagnosed after an unexplained cardiac arrest, after an abnormal ECG is found incidentally, or through family screening following a diagnosis in a relative.

The main treatment for those considered at high risk is an ICD (implantable cardioverter defibrillator), which can detect and terminate life-threatening arrhythmias. Certain medications and substances — including some antidepressants, sodium channel-blocking drugs, and large amounts of alcohol — can trigger arrhythmias in Brugada Syndrome and should be discussed with your cardiologist.

Because Brugada Syndrome is inherited, first-degree relatives (parents, siblings, and children) of anyone diagnosed should be offered cardiac screening.

Category: Implantable Devices

Bioimpedance analysis (BIA) — also known as bioimpedance body composition analysis — is a method of estimating body composition by sending a low-level electrical current through the body. It is commonly used in scales, gym equipment, and clinical settings. Manufacturers have traditionally recommended that patients with pacemakers, ICDs, or cardiac resynchronisation therapy devices (CRT-Ds) avoid BIA due to concerns about potential interference.

However, a small study published in 2012 evaluated 20 patients with heart failure who had either an ICD or CRT-D device implanted. The researchers performed BIA whilst monitoring their devices in real time and found no evidence of interference, including no telemetry disruption, no oversensing on the device leads, and no symptoms experienced by the patients.

Whilst this study suggests BIA may be safe in patients with certain cardiac implants, the researchers noted that further confirmatory studies with larger patient groups are still needed. As always, consult your cardiologist or cardiac electrophysiologist before undergoing any procedure if you have an implanted cardiac device.

Category: Implantable Devices

If you receive a brief electric shock from UK mains (240v) and have no visible injuries, the risk of damage to your ICD or lead is theoretically present but extremely unlikely and would be classed as very low risk.

This is because the current tends not to pass through the ICD or lead but passes through the body to the ground using the shortest and quickest route — for example, hand, up the arm, down the torso, and out through the leg. The majority of devices also have circuitry built in to protect them against electrical surges.

If you are feeling unwell after the shock, go to hospital. Otherwise, contact your local device clinic and request a device check, which can often be performed as a remote transmission. This will pick up any rare issues and provide reassurance.

Category: Electromagnetic interference

Doctors use guidance published by the DVLA when assessing whether a patient is medically fit to drive following a cardiac arrest, arrhythmia, or ICD implantation. This guidance sets out recommended periods of driving restriction based on diagnosis and treatment, and distinguishes between Group 1 licences (cars and motorcycles) and Group 2 licences (lorries and buses, which have stricter requirements).

For most people following a cardiac arrest or ICD implantation, a period of driving restriction is mandatory. The length of restriction depends on factors including whether an ICD was fitted, whether the arrest was due to an identifiable and treatable cause, and whether there are ongoing arrhythmia concerns. Restrictions typically range from one month to up to two years for Group 2 licence holders in some circumstances.

The responsibility for notifying the DVLA of a relevant medical condition rests with you as the licence holder, not your doctor. Your cardiologist or GP can advise you on whether and when you need to notify the DVLA, but you must make the notification yourself. Driving before you are medically and legally permitted to do so can invalidate your insurance.

For full clinical guidance, see the DVLA’s published Assessing Fitness to Drive guidance for medical professionals. For patient-facing information about driving restrictions after SCA, see our dedicated driving FAQs.

Category: Implantable Devices

A computer inside the AED analyzes the victim’s heart rhythm. The device determines whether a shock is needed. Some devices shock the victim automatically if a shock is needed. Other devices require that the operator press a button to deliver the shock. The shock is delivered through pads applied to the victim’s bare chest. The shock stuns the heart, stopping abnormal heart activity and allowing a normal heart rhythm to resume.

Category: Implantable Devices

A wearable cardioverter defibrillator (WCD) is prescribed for patients at risk of SCA. It consists of a garment, an electrode belt, and a monitor. While some defibrillator devices are implanted under the skin, the wearable defibrillator is worn under the clothes, directly against the patient’s skin.

Category: Implantable Devices

Ejection fraction (EF) refers to how well the heart is pumping. It’s the percentage of blood that is pumped out of the heart’s main pumping chamber during each heartbeat. If the EF is low (35% or lower), the person is at increased risk for sudden cardiac death. It is important to know that the EF can change over time.

Category: Cardiac Arrest

Maintain at least the recommended distance between the item and your heart device:

30cm (12 inches) distance

Car or motorcycle – from ignition system components
Electric fence
Electric pet containment fence – from buried wire and indoor antenna
Electrical transformer box

60cm (2 feet) distance

Metal detector – from the search head
Induction hob

Not recommended

Abdominal muscle stimulator (TENS-type ab belt)
Electronic body fat scale
Magnetic mattress pad or pillow

Category: Implantable Devices

Maintain at least a 15cm (6 inch) distance between the item and your heart device:

Electric golf buggy – from motor
Hand-held electric kitchen appliances (electric whisk, electric knife)
Electric shaver – corded
Electric toothbrush charging base
Exercise bike – from magnet in wheel
Hair dryer – hand-held
Hand-held back massager
Magnetic therapy products
Radio-controlled items – from antenna
Sewing machine – from motor
Small household magnet
Speakers
Tattoo machine
Treadmill – from motor
Ultrasonic pest repeller
Vacuum cleaner – from motor

Category: Implantable Devices

If used as intended and in good working condition, the following items carry no known risk for ICD patients:

Battery charger (household batteries)
CD, DVD, or Blu-ray player
Curling tongs
Dishwasher
Electric blanket
Electric guitar
Electric toothbrush
Electronic scales
Garage door opener
Hair straighteners
Heating pad
Hot tub
Air purifier
Iron
Kitchen appliances – small and large (blender, tin opener, fridge, cooker, toaster)
Massage chair or pad
Medical alert necklace
Microwave oven
Remote controls (TV, streaming device)
Salon hood hair dryer
Sauna
Battery-powered shaver or trimmer
Sunbed
Television

Category: Implantable Devices

The electromagnetic energy generated by a chainsaw is similar to other electric and liquid fuel-powered tools. If electromagnetic interference occurs with your heart device and you experience symptoms such as becoming dizzy or lightheaded, a running chainsaw may present a higher risk of injury to you than other power tools.

Category: Implantable Devices

Yes, but exercise extreme caution at all times. Follow the safety precautions below to minimise the risk of interference with your heart device while using a chainsaw.

• Maintain at least 15cm (6 inches) between the motor of an electric chainsaw and your heart device
• Ensure the equipment is properly earthed
• Maintain at least 30cm (12 inches) between the ignition system components of a petrol chainsaw and your heart device. Where possible, use a model with the spark plug positioned away from the handgrips
• Stop cutting and switch off the chainsaw immediately if you feel lightheaded, dizzy, or believe your ICD has delivered a shock
• Do not work on the engine while it is running
• Do not touch the coil, distributor, or spark plug leads of a running engine

Category: Electromagnetic interference

It is recommended you avoid using welding currents above 160 amps. If welding with currents under 160 amps, follow the precautions below to minimise the risk of interference with your heart device.

Welding safety precautions

Limit welding to currents below 160 amps
Work in a dry area wearing dry gloves and footwear
Maintain at least 60cm (2 feet) between the welding arc and your heart device
Keep welding cables close together and as far from your device as possible. Position the welding unit approximately 1.5 metres (5 feet) from the work area
Connect the earth clamp to the metal as close to the point of welding as possible
Wait a few seconds between attempts when having difficulty starting a weld
Ensure firm footing and adequate space to move freely
Work with someone else who is aware of your condition
Stop welding immediately and move away from the area if you feel lightheaded, dizzy, or believe your ICD has delivered a shock

As welding equipment may temporarily affect your heart device, any decision to use welding equipment should be made in consultation with your cardiologist or device clinic. Protective aprons and vests will not shield your device from electromagnetic interference generated by welding equipment.

Category: Implantable Devices

Unlike most other household power tools, welding with currents above 160 amps may have a higher tendency to temporarily affect the normal function of your pacemaker or implantable defibrillator.

Category: Implantable Devices

Even though most electromagnetic fields in the home environment will rarely affect the function of a pacemaker or ICD, it is recommended you keep any item containing magnets at least 15cm (6 inches) away from your device.

The reason for this is that there is a small magnetically activated switch built into pacemakers and ICDs. This internal switch is designed to close when a magnet of sufficient strength is placed over it.

When the switch closes in a pacemaker, the device paces the heart at a fixed pre-set rate (which may differ from your programmed settings).

When the switch closes in an ICD, it prevents the device from delivering treatment therapies.

You may not always know whether an item contains a magnet. However, if household items are used as intended and properly maintained, they should have no effect on your heart device. This includes microwaves, kitchen appliances, cordless phones, radios, televisions, computers, hair dryers, electric shavers, electric toothbrushes, electric blankets, and small power tools.

If you accidentally place a magnet too close to your device, simply move the item away. The pacemaker or ICD will return to its normal programmed settings once the magnet is removed.

The use of magnetic mattress pads and pillows is not recommended as it would be difficult to maintain a 15cm (6 inch) separation from your device at all times.

Category: Implantable Devices

Yes. Anti-theft security systems in shops and libraries generate electromagnetic fields that detect embedded tags on merchandise. Under unusual circumstances, these fields could temporarily affect the operation of your heart device, but significant interference is unlikely if you walk through normally.

It is recommended that you:

Be aware of anti-theft detector gates as you enter and leave
Walk through at a normal pace and do not linger near the equipment
If you experience any symptoms such as dizziness or palpitations near a security system, move away promptly. Your device will resume normal operation once you are clear of the equipment.

Category: Implantable Devices

Prior to any scan, your doctor should determine whether there is an effect on your heart device.

See our MRI Compatibility page for more information.

Category: Implantable Devices

Your doctor should discuss all potential benefits and risks of an MRI scan with you. Present your ID card to the doctor recommending the MRI scan. If needed, your doctor can seek more information from the manufacturer of your ICD.

Category: Implantable Devices

You should speak with your doctor regarding this situation.

Many modern ICDs and leads are compatible with MRI scanners and many are retrospectively approved.

See our MRI Compatibility page for more information.

Category: Implantable Devices

Many modern devices and leads are now MRI compatible but older ones are often not.

You can get more information about how to check by going to our MRI Compatibility page.

Category: Implantable Devices

Most people with an ICD can continue or return to the activities and hobbies they enjoyed before, including walking, cycling, swimming, golf, gardening, and many sports. The device is designed to allow your heart rate to rise normally during exercise without delivering unnecessary treatment.

Whether any specific activities need to be restricted depends on your underlying condition rather than the ICD itself. Your cardiologist will advise you on anything to avoid. If you are unsure about a specific activity, ask before resuming rather than avoiding everything out of caution.

Category: Implantable Devices

For most people, the practical impact of an ICD on daily life is less significant than they expect going into implantation. The device works continuously in the background and does not require any action from you under normal circumstances.

Most activities are possible with an ICD, including work, driving (after any mandatory restriction period), travel, sport, and sexual activity. The restrictions that apply depend far more on your underlying cardiac condition than on the device itself. Your cardiologist will give you specific guidance based on your individual diagnosis and risk profile.

There are practical adjustments to get used to. You will carry a device ID card at all times. You will attend regular clinic appointments, typically every six to twelve months, and may have a remote monitoring base station at home. Some electromagnetic sources require a safe distance. The device may occasionally produce sounds or alerts that need to be reported to your clinic.

The psychological adjustment is often the more significant challenge, particularly in the first year. Anxiety about a possible shock, changes to body image, and the constant reminder of cardiac risk are all common experiences. These are worth discussing with your cardiac team, and peer support from others living with an ICD can make a real difference. SCA UK can connect you with people who have been through the same process.

Category: Implantable Devices

Cardiac resynchronization therapy (CRT) helps restore a normal heart rhythm by pacing both sides of the heart. CRT delivers a steady pattern of small electrical pulses to the heart muscle through the leads. These small pulses encourage the heart to beat in a regular rhythm.

Category: Implantable Devices

An ICD or CRT-D is implanted to help you live as normal a life as possible. An ICD provides round-the-clock protection against sudden cardiac arrest (SCA). A CRT-D helps the heart pump more effectively whilst also providing protection against SCA. It may help to share information from this website with your partner, and to encourage them to attend clinic appointments with you so they can ask questions and feel more informed.

Category: Implantable Devices

Patients who meet the criteria for an ICD are at higher risk of sudden cardiac arrest (SCA). An ICD is implanted to help protect against this risk. Without an ICD, a life-threatening arrhythmia such as ventricular fibrillation may not be treated in time for the person to survive. You should discuss the risks of not having an ICD with your cardiologist or electrophysiologist, who can explain the benefits in the context of your specific condition.

Category: Implantable Devices

Yes. A hearing aid worn in the ear will not interfere with an ICD. If the hearing aid has any wireless accessories, such as a Bluetooth streamer worn around the neck, keep the accessory at least 15cm (6 inches) away from your device.

Category: Implantable Devices

An electronic cigarette will not interfere with an ICD.

Category: Implantable Devices

The effect of turning off a lead depends on which lead it is and what function it was providing. ICDs can have between one and three leads, each connected to a different chamber of the heart or serving a different purpose.

A lead may be turned off because it is no longer functioning correctly, because it is causing inappropriate sensing or therapy, or because a new lead has been added to replace its function. In some cases a lead is left in place but deactivated rather than removed, as lead extraction carries its own risks.

Whether the device can still deliver full therapy after a lead is turned off depends on the configuration. If the defibrillation lead is unaffected, the device can still deliver a shock when needed. If a pacing lead is turned off, the device may pace less effectively or not at all in certain situations. Your cardiologist will explain exactly what the change means for your individual device programming and what, if any, additional monitoring or precautions are needed.

If a lead has been turned off and you are unsure what that means for your protection, ask your ICD clinic directly. You are entitled to a clear explanation of how your device is currently configured and what it will and will not do.

Category: Implantable Devices

When using a powered hand tool, whether battery-powered or electric, keep the tool’s motor at least 15cm (6 inches) away from your device.

Category: Implantable Devices

Yes, you can use a heating pad. They have no known effect on ICDs.

Category: Implantable Devices

Not all ICDs can vibrate and when they do it is usually a patient alert feature.

You can find out more about alerts on our ICD Sounds and Alerts page.

Category: Implantable Devices

In most cases, you can undergo laser hair removal. Check with your doctor and the manufacturer of your ICD.

Category: Implantable Devices

No. Sleeping on the same side as your ICD will not damage the device or dislodge the leads once the implant has healed. The device is sealed in a durable titanium case designed to withstand normal physical activity, including sleeping positions.

In the first few weeks after implantation, you may find that sleeping on the implant side is uncomfortable as the area is still healing and tender. During this period, sleeping on the opposite side or on your back is generally more comfortable and avoids pressure on the wound. Once the incision has healed, you can sleep in whatever position feels comfortable.

If you experience ongoing discomfort or pain when lying on the device after the wound has fully healed, mention it at your next clinic appointment. Persistent discomfort can occasionally indicate that the device position needs to be reviewed.

Category: Implantable Devices

Your heart device can be programmed to make a beeping tone when something has happened that your doctor needs to be aware of. If you hear a beeping tone, contact your doctor. Your doctor can discuss with you what has happened. Your doctor can also program your heart device to send heart information automatically through a wireless device to your clinic. Your doctor will explain the type of wireless device that will be used to send your heart information.

Category: Implantable Devices

Some discomfort when sleeping on the implant side is common and usually normal, particularly in the weeks following the procedure. The area around the device is healing, and pressure on the wound site can cause aching or tenderness. This typically improves as healing progresses.

Once the wound has fully healed, some people still find the implant side less comfortable due to the size or position of the device, pressure from the device casing against tissue, or the way the leads sit. Trying a different sleeping position or a softer pillow placed over the device area may help. Some people find a small pillow or rolled towel between the chest and the mattress when side-sleeping provides relief.

If discomfort is significant, persistent, or getting worse rather than better after the wound has healed, mention it at your next clinic appointment. In some cases, the position of the device can be reviewed. Do not ignore ongoing pain in case it indicates an issue with the device or lead.

Category: Implantable Devices

They may feel something if you are touching them when you receive a shock, just as they might if you were touching out of the water. They will not be affected differently because you are in a pool.

Category: Sports

There are four main companies that make defibrillators, including Medtronic, Boston Scientific, St. Jude Medical (Abbott) and Biotronik. Several smaller companies also manufacture ICDs.

Category: Implantable Devices

Lead perforation is a potential complication occurring rarely in heart device implant procedures. It occurs when a lead pokes through the heart wall instead of embedding into the heart wall muscle.

Category: Implantable Devices

DDD and VVI are pacemaker therapy modes that your doctor can program in your device. These are just two of many options. Each letter indicates something different (A=Atrium; V=Ventricle; D=Dual or both A and V; and O=none). The first letter indicates the chamber of the heart being paced. The second letter is the heart chamber being sensed. The third letter indicates how the device should respond when it senses a cardiac event (T=Triggered; I=Inhibited; D=Trigger or Inhibit; and O=none). Finally, the fourth letter, usually “R”, means that the rate response in the device is turned on (R=Rate Modulation on; O or blank = none or no rate modulation).

Category: Implantable Devices

It is generally not necessary to turn off an ICD when a woman is delivering a baby. Talk to your doctor about your specific medical situation.

Category: Implantable Devices

Depending on your body structure and the size of your ICD, you may see the device under your skin. The bump will be about the same size as the ICD and may be visible if you wear strapless clothing. The scar is typically about 2 inches long, just below the collarbone.

Category: Implantable Devices

Bras with underwires will not affect your ICD. However, the strap from any bra may cause discomfort at the implant site until the incision heals from the surgery.

Category: Implantable Devices

ICDs are programmed to meet a person’s needs. Typically, an ICD will be set to deliver 20-35 joules per shock. Talk to your doctor to discuss how your ICD is programmed.

Category: Shock

When your heart device is implanted, your doctor threads one end of the lead through a vein into your heart, attaching the lead tip to the heart wall. Your doctor then connects the other end of the lead to your heart device.

Category: Implantable Devices

The amount of battery used to deliver a shock depends on the specific ICD manufacturer and model, as well as the amount of energy your device is programmed to deliver. When longevity is estimated for ICDs, the frequency of device charging is included.

Category: Implantable Devices

Most ICDs today have both pacing therapies as well as defibrillation capabilities, so only one device is needed.

Category: Implantable Devices

For most people with an ICD, moderate resistance exercise including bench-pressing is not ruled out, but there are important considerations depending on when you were implanted and what your underlying condition is.

In the weeks immediately after implantation, lifting heavy weights is restricted. Sudden forceful use of the pectoral muscle on the side of the device can place stress on the lead before it has fully bedded in, and your clinic will give you specific guidance on arm and shoulder movement during this initial period. Most people are asked to avoid raising the arm on the implant side above the shoulder or lifting anything heavy for four to six weeks.

Once fully healed, whether you can return to weightlifting depends largely on your underlying condition rather than the device itself. High-intensity exercise raises heart rate significantly and in some conditions this can increase arrhythmia risk. Your cardiologist is the right person to advise on what intensity is safe, and an exercise test may be used to assess your individual response.

There is also a practical consideration with heavy pressing movements: repeated significant pressure directly over the device site, or any exercise that causes the device to shift or become uncomfortable, should be discussed with your clinic. A protective vest or pad may help in some situations.

Category: Implantable Devices

Your ICD has an outer casing, a battery, a small computer, and a connector block at the top that connects the device to the leads. All electronic components are sealed inside a metal case made of titanium, which is used because it is lightweight, durable, and biocompatible with the human body.

Category: Implantable Devices

A pacemaker contains a very small computer that controls the pacemaker operation. It is powered by a tiny lithium battery. All electronic components of your pacemaker are sealed inside a metal case made of titanium.

Category: Implantable Devices

Yes. Many people with ICDs and pacemakers choose to wear a medical ID bracelet or necklace alongside their device ID card. A medical ID can alert emergency responders to your device if you are unable to communicate. You can search online for suppliers of medical ID jewellery — several companies specialise in engraved medical alert products. Your local pharmacy may also stock basic options.

Category: Implantable Devices

It is common to have some soreness and tenderness at the incision site for several days after the procedure. There also may be some bruising. Healing of the incision is usually complete within 7 to 14 days. Your doctor may place restrictions on lifting and activities for several weeks following your surgery to allow for complete healing.

Category: Implantable Devices

Body fat scales that use bioimpedance analysis (BIA) send a low-level electrical current through the body to estimate body composition. Because this current may potentially interfere with an ICD or pacemaker, manufacturers of cardiac devices have traditionally advised caution with these scales.

A small study did suggest that BIA may be safe in patients with ICDs, with no interference detected during real-time monitoring. However, the evidence base is limited and current guidance remains cautious. The safest approach is to use a standard weighing scale that measures weight only, with no bioimpedance function. These are widely available and carry no risk to your device.

If you specifically need body composition analysis for medical or fitness reasons, discuss it with your cardiologist before using a BIA device. For a more detailed review of the evidence, see our FAQ on bioimpedance analysis and ICDs.

Category: Implantable Devices

Remote monitoring is an option that many people find convenient because it can decrease the number of clinic visits for follow-up. These days, some heart devices can even be monitored via an app on a patient’s smartphone. Discuss this option with your doctor to see if it’s right for you.

Category: Implantable Devices

ICD lead recalls and safety alerts do occasionally occur. In the UK, the Medicines and Healthcare products Regulatory Agency (MHRA) is responsible for issuing medical device safety alerts, and manufacturers are required to notify affected patients and clinicians when a recall or field safety corrective action is issued.

If your leads are subject to a recall or safety alert, your ICD clinic should contact you directly with information about what has been found, what the risk level is, and what action if any is recommended. In many cases no immediate action is needed and increased monitoring is sufficient. In others, earlier replacement may be recommended. The decision is made on an individual basis taking into account the specific issue, your overall risk profile, and the risks of any procedure to address it.

If you have concerns about your leads and have not heard from your clinic, you can contact them directly and ask. You can also search the MHRA’s medical device alerts database at gov.uk/drug-device-alerts to see if any alerts have been issued for your device or lead model. You will find your device and lead model details on your device ID card or in your implant documentation.

Category: Implantable Devices

ICDs connect to the different chambers of your heart using 1 to 3 leads. Your doctor will determine the number of leads implanted based on your individual needs.

Category: Implantable Devices

Most people are aware of receiving an ICD shock. Those who are conscious during a therapy shock most commonly describe it as a sudden thump or kick to the chest. The sensation startles them, but passes quickly. Some find it brief but distressing; others find it reassuring that the device is doing its job. Some people lose consciousness during a rapid arrhythmia and are not aware they received a shock at all.

Category: Implantable Devices

Your ICD clinic or cardiac nurse should give you a written shock plan before you leave hospital after implantation. This sets out exactly what to do if your device delivers a therapy shock. If you have not received one, ask for it at your next clinic appointment.

In general, if you receive a single shock and feel well immediately afterwards, contact your ICD clinic the same day or the next working day so the episode can be reviewed by downloading your device data. If you receive two or more shocks in quick succession, feel unwell after a shock, or the shock does not resolve your symptoms, call 999 immediately.

If you are unsure what to do in any situation, contact your ICD clinic. Most clinics have a dedicated number for urgent queries during working hours, and you should be given a number to call out of hours.

Category: Shock

You should talk to your doctor about any symptoms you are having.

Some devices can provide pacing or anti-tachycardia therapy and this may be felt by some.

Some devices also have patient alert features, such as making a beep or vibrating.

Check out our Sounds and Alerts page for more information.

Category: Implantable Devices

Your doctor will discuss any restrictions to activities that may be necessary after you have healed from your surgery. It is unlikely that your ICD will affect your playing the cello.

Category: Implantable Devices

An ICD can be implanted on either side of the chest, depending on a person’s unique anatomy. Talk to your doctor about your concerns.

Category: Implantable Devices

It is possible, but there are considerations to be aware of. Each ICD manufacturer uses proprietary components and may have unique patented therapies, resulting in differences in features such as battery longevity, size and shape, available therapies, and remote monitoring services. Switching manufacturer at replacement is not always straightforward if existing leads are to be retained.

Your cardiologist will advise on what is clinically appropriate for your individual situation and may involve the manufacturer’s clinical support team in that discussion. It is reasonable to ask about your options at your next clinic appointment.

Category: Implantable Devices

Each patient describes an ICD shock differently. Some say it feels like a thump on the chest while others compare it to being kicked in the chest. It is normal to feel apprehensive, but also remember that a defibrillating shock from an ICD can be lifesaving. For most people, if there is pain, it quickly passes.

Category: Implantable Devices

Some people wrap a towel around the seat belt. You also may want to check out seat belt pads.

Check out our ICD Protection page for information on commercial products to protect your ICD

Category: Implantable Devices

An abdominal implant site may require some additional caution in contact sports such as rugby, martial arts, or football, where there is a risk of a direct blow to the abdomen. Whether specific activities are restricted will depend on your underlying condition and your cardiologist’s advice, not solely on the implant location.

Discuss any sport or physical activity you want to continue or take up with your cardiologist before returning. A body protector or pad worn over the device may be recommended in some circumstances.

Category: Implantable Devices

Your doctor will determine what conditions will trigger an alert. Ask your doctor to explain what the alerts mean in your particular case. The beeping tone is designed to get your attention, not to alarm you. If you hear beeping tones from your heart device, call your doctor for instructions. The alert sounds will continue until your doctor checks your device at the clinic and programs the alert off.

Check out the Sounds and Alerts page for more information.

Category: Implantable Devices

Yes. If you enter a hospice or reach the end of life, the shock therapy delivered by your ICD can be deactivated. This is a legal, ethical, and clinically supported option in the UK, and one that your clinical team should raise proactively as part of end-of-life planning rather than leaving it to you to ask.

The reason deactivation is worth considering is that an ICD will continue to deliver shocks in response to dangerous arrhythmias even in the final stages of life, when those shocks will not change the outcome and may cause distress. Deactivating the shock therapy means the device stops delivering those interventions, while pacing functions, if present, can usually remain active if they are providing comfort.

Deactivation is not the same as switching off the heart. It simply removes one layer of treatment that is no longer appropriate. It can be reversed at any point if your wishes change.

The decision is made jointly between you, your family if you wish, and your clinical team. An advance decision to refuse treatment (ADRT) can also be used to document your wishes in advance, including your preferences about ICD shock therapy at end of life. The British Heart Foundation and the Resuscitation Council UK both provide guidance on this.

If you are in this situation and your clinical team has not raised the subject, it is entirely appropriate to bring it up yourself or to ask a hospice nurse to help facilitate the conversation.

Category: Implantable Devices

A transmitting sound amplifier worn around the neck should be kept at least 15cm (6 inches) away from your ICD at all times. If the device hangs at chest level, check that the position does not bring it close to your implant site.

Category: Implantable Devices

Your heart device monitors your heart rhythm and delivers therapy wherever you are in the world. There are no specific restrictions on travelling abroad with an ICD, though there are some practical considerations to plan for.

Take your device ID card with you at all times. This identifies your device to medical staff if you need treatment abroad and helps at airport security. Make sure you have comprehensive travel insurance that covers your cardiac condition. Let your ICD clinic know you are travelling, particularly if you are going for an extended period, as remote monitoring may need to be adjusted for a different time zone or if you will be away from your base station.

If you need medical attention abroad, inform the treating team that you have an ICD and carry the manufacturer contact details with you. In an emergency, they can provide technical support to local clinicians.

Category: Implantable Devices

It is possible to have both an ICD and a vagal nerve stimulator. Some precautions may be necessary, however. Consult with your doctor.

Category: Implantable Devices

Commercial flying is safe with an ICD. Aircraft cabins are pressurised to an equivalent altitude of around 6,000 to 8,000 feet, well within the range that ICD devices are designed to operate in.

For high-altitude activities such as mountain hiking or climbing at significant elevation, the considerations relate more to your underlying cardiac condition than to the device itself. High altitude reduces the amount of oxygen available, which increases the workload on the heart and can, in some conditions, increase arrhythmia risk. Whether a specific altitude is safe depends on your diagnosis and your current level of fitness. Discuss any planned high-altitude activities with your cardiologist before going.

For unpressurised light aircraft or skydiving, some ICD manufacturers specify altitude and pressure ratings for their devices. If you are involved in aviation, contact your ICD clinic and the device manufacturer directly for guidance specific to your model, and note that the Civil Aviation Authority has separate requirements for pilots and aircrew with cardiac conditions.

Category: Implantable Devices

Not automatically, but it depends on why you have an ICD. If your device was implanted following a cardiac arrest or arrhythmia caused by an inherited condition such as HCM, Long QT Syndrome, Brugada Syndrome, CPVT, or ARVC, then your first-degree relatives should be offered cardiac screening. These conditions can run in families and may be present in relatives who have no symptoms at all.

Family screening is arranged through an inherited cardiac conditions (ICC) clinic. Your own cardiologist can make a referral, or your relatives can ask their GP to refer them. Screening typically includes an ECG and echocardiogram, and may include an exercise stress test or genetic testing depending on the condition involved.

A positive finding in a family member does not automatically mean they will need an ICD. Treatment depends on the condition, the individual’s risk profile, and their clinical presentation. Some family members will need no treatment at all; others may be started on medication or monitored regularly.

If your ICD was implanted for a reason unrelated to an inherited condition, such as heart failure following a heart attack, routine family screening is not usually indicated, though your cardiologist will advise.

Category: Implantable Devices

Long-term monitoring of ICD performance has shown that defibrillating a patient in sudden cardiac arrest is 98% effective in stopping the Sudden Cardiac Arrest (SCA).1,2

References:
1- Zipes DP, Roberts D, for the Pacemaker-Cardioverter-Defibrillator investigators. Results of the International Study of the Implantable Pacemaker Cardioverter-Defibrillator: A Comparison of Epicardial and Endocardial Lead Systems. Circulation. July 1, 1995;92(1):59-65.
2- Volosin, et. al. Virtual ICD: A Model to Evaluate Shock Reduction Strategies. Heart Rhythm. 2010;May Suppl:PO3-125.

Category: Implantable Devices

Leads are placed in the hostile environment of the human body, making it hard to predict longevity. Your doctor will regularly monitor your device and lead function for any signs of malfunction.

Category: Implantable Devices

How an ICD looks in the body depends on individual anatomy and where the device is placed. Typically, there is a small bump under your skin.

Category: Implantable Devices

Your ICD is designed to deliver therapies that progress from the mildest form to be effective to an actual shock. If you receive a shock from your ICD, you will feel an obvious electrical jolt to your body, but each patient describes an ICD shock differently. Some say it feels like a thump on the chest, while others compare it to being kicked in the chest. It is normal to feel apprehensive, but also remember that a defibrillating shock from an ICD can be lifesaving. For most people, if there is pain, it quickly passes.

Category: Implantable Devices

You will probably not need new leads. However, your doctor will test your existing leads before, during and after your surgery. If tests indicate that it’s time for new leads, they will be replaced along with your ICD.

Category: Implantable Devices

Most ICD replacements are carried out as a day case procedure and an overnight stay is not usually required. If a lead needs to be replaced or added at the same time, a short inpatient stay of one or two nights may be necessary. Your clinical team will advise you on what to expect for your specific procedure beforehand.

Category: Implantable Devices

No. ICDs are designed for single-patient use only and must not be reused. This is a regulatory requirement in the UK and across the EU — all implantable medical devices are classified as single-use once explanted. Reusing an explanted ICD would be illegal and dangerous: it is impossible to guarantee the complete removal of body tissue or fluid from the device, and sterility cannot be assured after removal, creating a serious risk of infection and adverse reaction. The electronics and battery may also have degraded in ways that are not externally visible.

When an ICD battery reaches end of service, the generator is replaced with a new device. The old device is disposed of in accordance with medical waste regulations.

Category: Implantable Devices

Rechargeable technology for ICDs is an active area of research and development. Some devices in early trials have incorporated wireless charging technology, and at least one manufacturer has brought a rechargeable ICD to market in certain territories. The landscape is evolving and availability in the UK may increase over time.

The challenge with rechargeable ICDs is ensuring that the device always has sufficient charge to respond instantly to a dangerous arrhythmia. Unlike a phone or hearing aid, an ICD cannot be allowed to run low. Any rechargeable system needs robust safeguards and monitoring to ensure charge levels never compromise the ability to deliver therapy.

Currently, most ICDs use a non-rechargeable lithium battery with a typical lifespan of seven to twelve years depending on how frequently the device delivers therapy. When the battery reaches a certain threshold, the generator is replaced in a routine procedure. Your ICD clinic monitors battery status at every appointment and via remote monitoring, so you will always have plenty of notice before a replacement is needed.

Category: Implantable Devices

Typically, the leads are reused with the new heart device. If the existing leads cannot be reused, they will stay in the body and new leads will be implanted. In certain situations, the doctor may recommend a lead be removed and replaced with a new lead.  The lead removal procedure is usually performed by a doctor who specializes in lead extractions.

Category: Implantable Devices

Your ICD has replacement time indicators, such as lower battery voltages. These give your doctor plenty of time to schedule a replacement before the battery runs out. Continue regular follow-up visits so your doctor can monitor your condition and device operation.

Category: Implantable Devices

Your doctor will keep a close watch on your ICD battery life through regular follow-up visits and/or with remote monitoring systems.

Some ICDs emit an alert when the time is for a change. See our ICD sounds and alerts page for more information

Category: Implantable Devices

If your air bags go off while you are in a car, whether you have an ICD or not, seek immediate medical attention.

Category: Implantable Devices

The majority of your ICD consists of the battery and capacitor (the component that stores and delivers charges). A smaller portion consists of the device’s electronics.

Category: Implantable Devices

While ICD components are protected in titanium cases, you should still avoid activities that may involve hard physical contact.

Category: Implantable Devices

Pressure ratings can vary among ICD models. Typical diving depths can range from 50 to 100 feet. Always check with your doctor about scuba diving restrictions.

Category: Implantable Devices

Phones, which use wireless signals, have electromagnetic fields around them. Some of these fields may affect the normal operation of your heart device. Your phone should be kept at least 6 inches away from your device.  When using a mobile phone, it is best to hold it to the ear that is farthest away from your heart device. Also, is a good idea to avoid carrying your phone in a shirt pocket that is close to the ICD.

Category: Implantable Devices

No, your phone should be kept at least 6 inches away from your device. Cell phones, which use wireless signals, have electromagnetic fields around them. Some of these fields may affect the normal operation of your heart device. When using a mobile phone, it is best to hold it to the ear that is farthest away from your heart device.

Category: Electromagnetic interference

Aviation transponder receivers are used to track the location of an aircraft. They are designed to receive signals only from aircraft transponders and pose no threat to your ICD.

Category: Implantable Devices

When jump starting an engine, maintain at least 24 inches between the jumper cables and your ICD.

Category: Implantable Devices

Wireless battery chargers that don’t require an AC plug-in are used to charge items such as cell phones, music players and tablets. When using this type of charger, keep at least 6 inches between the charger and your ICD.

Category: Implantable Devices

When using an AC charger of up to 100 amps, such as those used to recharge a car battery, keep your ICD at least 12 inches away from the charger.

Category: Implantable Devices

For some electric vehicles, there may be safety precautions when charging the battery. For example, you may not be able to sit in the vehicle while it is charging. Check with the car’s manufacturer for guidelines.

Category: Practical Issues

Yes, it is safe to drive an electric car if you have an ICD or other heart device.

Category: Implantable Devices

Cosmic rays consist of high-energy radiation that strikes the earth from space. Most of these flares and rays are absorbed in the atmosphere and are unlikely to affect an ICD once they reach the ground.

Category: Implantable Devices

If you receive a therapy shock, anyone touching you may feel the shock as a muscle spasm or a tingle, although it is unlikely. A therapy shock can be startling, but it will not hurt a person touching you.

Category: Shock

No. You will not receive a warning from your ICD before a shock. However, you may have symptoms that tell you a shock may be imminent.
Symptoms may include dizziness, lightheadedness, or a fluttering in the chest.

Category: Implantable Devices

No, your ICD will only shock you if it detects a heart rhythm that is too fast.

Category: Implantable Devices

No, your ICD is designed to deliver a shock to treat heart rhythms that are too fast.

Category: Shock

There are no medications that interfere with your ICD. Talk with your doctor about any questions or concerns regarding medication.

Category: Implantable Devices

There are no known foods that interfere with your ICD. The device responds to your heart’s electrical activity, not to what you eat.

However, diet does matter for your heart health more broadly. Some cardiac medications — particularly warfarin — can be affected by foods high in vitamin K (such as leafy greens), and grapefruit can interact with several heart medications. If you are on warfarin or have specific dietary questions in relation to your medications, ask your GP or pharmacist for advice.

Category: Implantable Devices

If you work on power lines, you may encounter interference with your ICD’s operation. Consult with your employer and your doctor.

Category: Implantable Devices

Standing under large power lines at ground level should not affect your ICD. However, stay out of any fenced areas such as substations.

Category: Implantable Devices

Yes. You can work on your car as long as there is no medical reason to avoid working around engines. You should, however, keep at least 12 inches between your ICD and parts of the car’s ignition system.

Category: Driving

You should keep at least 12 inches between your ICD and parts of the car’s ignition system.

Category: Implantable Devices

Check with your doctor about any restrictions. Some doctors do recommend limiting use of the arm that is on the same side as the ICD. The surgical site may be sensitive after the implant procedure and need time to heal for a number of days. However, after a while, you should be able to resume activities that you were doing before getting the device. Tennis anyone?

Category: Implantable Devices

Yes. However, they are typically replaced with a new ICD.

Category: Implantable Devices

There are no risks from using a heated car seat because there is at least 6 inches between the seat’s electrical components and your ICD. So continue to enjoy this small luxury during the winter months.

Category: Implantable Devices

Using a vibrator poses no risks. Just make sure the vibrator is in good working condition and has no electrical problems.

Category: Implantable Devices

A momentary shock will not permanently damage your ICD. A memorable (longer) shock may cause some ICD settings to be reset to nominal values. Your doctor can restore your individual settings in the clinic.

Category: Implantable Devices

Yes. Both mains-powered and battery-powered electric fences pose a low risk to your ICD, because the electrical pulse is delivered very briefly — approximately once per second. If you accidentally touch an electric fence, the momentary shock will be startling but will not permanently damage your device. It may temporarily affect the pacing function of your ICD, but normal operation will resume once you move away.

Keep at least 30cm (12 inches) between your ICD and the fence wire and energiser unit when working near electric fencing.

Category: Electromagnetic interference

While it is possible for frozen shoulder (adhesive capsulitis) to occur with ICD implants, it is unlikely. Performing gentle arm motion during the healing process will likely prevent this condition from occurring.

Category: Implantable Devices

Temporarily limiting certain arm movements can help with healing and also prevent dislodgement of the leads. You should be able to go back to your normal arm movements after you have healed from the surgery.

Category: Implantable Devices

MRI equipment generates large magnetic fields and radio waves that may interfere with ICD operation. Check with your doctor to see what precautions, if any, you should follow when working around MRI machines.

Category: Implantable Devices

Items that generate or use electricity or transmit wireless signals have electromagnetic fields around them. Some of these fields may affect ICD operation. Remember that most items used in everyday life are not likely to affect your ICD. However, if you are concerned about equipment in your work environment, ask your employer to measure electric field intensity limits that may interfere with your ICD or to hire an outside firm to do so.

Category: Implantable Devices

Yes, you can use a urinary monitor that includes a magnet. Just remember to keep the tether magnetic strap and battery compartment of the monitor at least 6 inches away from your ICD.

Category: Implantable Devices

Yes, electroconvulsive therapy can be performed if you have an ICD. However, because this therapy introduces electrical current into the body, there may be an effect on your ICD. If you are considering electroconvulsive therapy, please consult with your doctor first to see if there are any possible risks from the procedure on your device and condition.

Category: Implantable Devices

A colonoscopy is an exam that uses a tiny video camera to look for abnormalities in the large intestine. A colonoscopy can be safely performed on patients with heart devices. Sometimes during the exam they may use electrocautery to remove polyps. In this case, the doctor performing the procedure would need to take precautions while using the electrocautery.

Category: Implantable Devices

Ischemic cardiomyopathy (CM) is the most common type of dilated cardiomyopathy. In ischemic CM, the heart’s main pumping chamber, the left ventricle, has been damaged by a lack of blood supply to the heart. This is usually caused by a heart attack or coronary artery disease (CAD). The result is an enlarged, dilated, and weakened heart that cannot adequately pump blood through the body.

Category: Implantable Devices

ICDs are entirely compatible with normal sleep. Initially, you may find it uncomfortable to lie on the side of your implant, but most people adjust within a few weeks as the site heals.

If your device is also pacing your heart, you may occasionally be aware of the pacing sensation, particularly when lying still at night. This usually becomes less noticeable over time.

Sleep disturbance is common after cardiac arrest and ICD implantation, and is often related to anxiety, hypervigilance, or adjusting to the reality of having a device rather than the device itself. If sleep problems persist, discuss them with your GP — addressing underlying anxiety or adjusting to your new situation with support can make a significant difference.

Category: Implantable Devices

Because the remote monitoring systems can potentially warn your doctor of changes in your condition, resulting in early intervention within hours or days of the change, it is recommended that the remote or app-enabled monitoring be available as much as possible. If you don’t currently have remote or app-enabled monitoring set up, ask your clinic about using it. They will work with your ICD manufacturer to get you enrolled.

Category: Implantable Devices

Yes, there are different versions of remote monitors available that do not require a landline connection, using different wireless technologies.

Category: Implantable Devices

Riding a motorcycle is considered a low-risk activity and so it is usually permitted. However, this may vary depending on any medical conditions you have and your applicable driving laws, so do consult your doctor first.

Category: Implantable Devices

No inappropriate interactions between ICDs and hybrid vehicles have been reported, so it’s a low risk.

Category: Driving

Yes, keep wearing your seatbelt. If it hurts or creates pressure near your device, just put some padding between you and the belt.

Category: Implantable Devices

The ship’s radar is normally located far enough from any public areas that it won’t affect your ICD.

Category: Implantable Devices

Yes. Taking a cruise is safe with an ICD. The ship’s radar equipment is located well away from passenger areas and is very unlikely to interfere with your device.

Before travelling, make sure you carry your device ID card at all times, as it contains important information about your device and may be needed at port security. It is also worth contacting your travel insurer to confirm your cover — see our FAQ on travel insurance for more information. Let your device clinic know you are travelling so they can advise on remote monitoring arrangements if needed.

Category: Implantable Devices

Skiing will not interfere with your ICD. Whether you are able to ski depends on your overall medical condition and your cardiologist’s guidance, not the device itself.

Most people return to skiing and other physical activities after a full recovery from ICD implantation. Discuss any concerns with your cardiologist before you travel, particularly if you have an exercise-triggered condition, or if high altitude is relevant to your heart condition.

Category: Sports

After you’re healed from the implantation, no, it should not hurt to get a hug. If you ever do feel lingering pain or discomfort around your device, call your doctor.

Category: Implantable Devices

Yes. Riding on a train or tram poses a very low risk of interference with an ICD. However, we recommend talking to your cardiologist before your journey up the mountain, as there are lower oxygen levels at high altitudes.

Category: Implantable Devices

Yes. In the UK you are legally required to inform the DVLA if you have a condition or device that may affect your ability to drive safely. Having an ICD is a notifiable condition.

For Group 1 licences (car and motorcycle), there is typically a period of driving restriction following ICD implantation (usually six months), and further restrictions may apply if your device delivers a shock. For Group 2 licences (lorries and buses), the restrictions are stricter and in many cases permanent.

You should notify the DVLA using the appropriate medical questionnaire. For most people with an ICD, this is the DEFIB1 form, available on GOV.UK. If you drive a coach, bus or lorry (Group 2 licence), use the VOCH1 form instead. Your cardiologist or device clinic can support you with this process and provide any necessary medical information. You should also inform your motor insurer, as failing to disclose a relevant medical condition can invalidate your policy.

Always check the current DVLA guidance, as the rules are updated periodically. The full guidance is available at www.gov.uk/dvla/medicalenquiries.

Category: Implantable Devices

No. Not only is your ICD built to withstand stress, but your body temperature stays fairly constant as well.

Category: Implantable Devices

You may notice a slight bulge under the skin where an ICD is implanted. This is normal. How it looks depends on the size of the device, size of the patient, where it’s implanted and other things.

Category: Implantable Devices

Exposure to pressures greater than 4 ATA is not recommended. That means diving no deeper than about 100 feet or 30 meters in seawater. Talk to your doctor about that and about any other concerns with scuba diving and your heart condition.

Category: Implantable Devices

It depends on what kind of boxing you mean.

Fitness boxing (bag work, pad work, shadowboxing) is generally considered acceptable for most people with ICDs, provided your cardiologist has cleared you and you’re past your initial recovery period. It’s an effective cardiovascular workout and vigorous exercise alone won’t trigger your device inappropriately.

Contact boxing (sparring or competitive bouts) is a different matter. The primary concern is direct impact to your ICD site, typically the upper left chest. A hard blow to that area could potentially dislodge a lead or damage the device housing. There’s also a broader consideration with contact sports: repeated physical trauma raises your overall risk profile, particularly if your underlying condition involves arrhythmia.

Most cardiologists will advise against competitive or contact boxing. If boxing is important to you, it’s worth having a frank conversation with your cardiology team about the specific type, your underlying condition, and what a safe approach might look like.

If you do train in a boxing gym, specialist protective vests that shield the ICD site are available and worth considering.

For guidance on exercise and returning to physical activity, visit our Exercise After Cardiac Arrest page.

Always discuss contact sports with your cardiologist before taking part.

Category: Implantable Devices

No. The tiny electrical current produced by a novelty hand buzzer or similar toy is far too weak to interfere with an ICD. There is no clinical evidence that these devices pose any risk to implanted cardiac devices.

If you have any concerns about a specific device or situation, contact your ICD clinic for reassurance.

Category: Electromagnetic interference

Induction cooktops are very haute in the world of cuisine, but they do pose a concern to ICDs. Instead of heating up themselves, they use magnetic energy to heat the pan, made of steel, aluminum or copper. Therein lies the rub. Because of the magnetic fields, make sure your device is at least 2 feet away from the cooktop.

Category: Implantable Devices

Pet shock collars for electric pet fences, including remote controls and bases with antennas, should be kept six inches away from your heart device.  Buried wires should be at least 12 inches from your ICD.

Category: Implantable Devices

Heart devices such as ICDs are very tough and in normal day to day activities shouldn’t require any extra protection. However, if you would prefer to have an additional layer of protection there are a number of options available and these can be found on our ICD Protection page.

Category: Implantable Devices

Yes. Plumbing work is generally safe for people with ICDs. The tools and materials used in most plumbing tasks do not generate electromagnetic fields that would affect your device.

If your work involves power tools with electric motors, apply the standard precaution of keeping the motor at least 15cm (6 inches) from your device. If you work near large pump motors or industrial electrical systems, the same principles as for other industrial environments apply — discuss your specific work environment with your cardiologist or device clinic if you have concerns.

Category: Implantable Devices

Yes. Lasers are light energy and shouldn’t mess with your ICD. However, some magnets or transmitters in laser tag vests may interfere with your ICD, so keep it 6 inches away from your device.

Category: Insurance

In the UK, holding an ICD will prevent you from holding a Group 2 licence, which covers lorries (LGV/HGV) and buses (PCV). If you currently hold a Group 2 licence, having an ICD implanted will typically result in its revocation by the DVLA.

This can be a significant and distressing consequence for professional drivers, and it is worth discussing the implications with your cardiologist before implantation where possible. In some circumstances, alternatives to ICD therapy may be considered, though this is always weighed carefully against the risk of sudden cardiac arrest.

If you drive professionally and have been told you need an ICD, speak to your cardiologist and contact the DVLA for specific guidance on your situation. Occupational health support from your employer may also be available.

Category: Implantable Devices

In the UK, having an ICD or the underlying heart condition that led to its implantation will almost always prevent you from holding a Civil Aviation Authority (CAA) medical certificate, which is required to fly as a pilot of any category.

This applies to Private Pilot Licences (PPL), Commercial Pilot Licences (CPL), and Airline Transport Pilot Licences (ATPL). The CAA assesses each case individually, but conditions such as ventricular arrhythmia and ICD implantation are considered disqualifying in the vast majority of circumstances due to the safety implications of sudden incapacitation at altitude.

If you are a trained pilot and are facing ICD implantation, it is worth seeking specialist aviation medical advice early — ideally from an Aeromedical Examiner (AME) — before any decisions are made, so that all options are fully understood. In very limited circumstances, some pilots may be able to fly in certain categories with specific conditions, but this is rare and assessed on a case-by-case basis.

More information is available from the UK Civil Aviation Authority at www.caa.co.uk.

Category: Implantable Devices

Wi-Fi shouldn’t be a problem as long as you keep your ICD at least 6 inches away from the wireless router and the receiver on your computer.

Category: Implantable Devices

Most machine shop environments are safe for people with ICDs, but some industrial settings — particularly those involving high-powered electrical equipment, arc welding, large motors, or induction heating — may generate electromagnetic fields that could temporarily affect your device.

If you work in a machine shop or industrial environment, it is worth asking your employer to identify any equipment that may generate significant electromagnetic fields and keeping at least 15cm (6 inches) from motors and electrical components where possible. Your cardiologist or device clinic can advise on your specific situation, and your employer’s occupational health service may also be a useful resource.

If you experience symptoms such as dizziness, palpitations, or a shock while near industrial equipment, move away from it promptly and contact your device clinic.

Category: Implantable Devices

If you get an ICD, you may notice a number of changes after implantation. Some people have more energy because the device is pacing their heart and delivering therapies to help with fast rhythms.

Category: Implantable Devices

Yes. A petrol-powered lawn mower requires you to keep at least 30cm (12 inches) between the running ignition system and your ICD. For electric lawn mowers, maintain at least 15cm (6 inches) between the motor and your device. These are the same precautions as for other petrol and electric powered tools.

Category: Implantable Devices

Yes. Remember to discuss exercise with your doctor, and follow their guidelines based on your own health needs. It’s always best to ease back into a fitness routine. Walk before you jog, jog before you run, etc…

Category: Implantable Devices

Yes. Exercise is actively encouraged for most people with ICDs. Physical activity supports heart health, mental wellbeing, and recovery. An ICD is not implanted to limit you; it is there to protect you if a dangerous arrhythmia occurs.

The type and intensity of exercise that is appropriate depends on your underlying condition and your cardiologist’s guidance. Most people can resume moderate exercise such as walking, swimming, and cycling after a full recovery from the implant procedure. Some may be advised to avoid very high-intensity exercise or competitive sport, particularly if they have an exercise-triggered arrhythmia condition.

Cardiac rehabilitation is an excellent starting point for rebuilding fitness safely after cardiac arrest or ICD implantation. Ask your GP or cardiac team for a referral, particularly if you were not automatically offered one. In the UK, cardiac rehab is most consistently commissioned for people who have had a heart attack, and survivors with no identified cause (idiopathic) or an arrhythmia-related cause are sometimes not offered it. Be persistent.

For full guidance on returning to physical activity, see our Exercise After Cardiac Arrest page.

Category: Implantable Devices

E-readers have wireless transmitters to work on data networks, so we recommend keeping them 6 inches away from your ICD. So, no, you shouldn’t fall sleep with them snuggled up close. That’s getting a little too attached to your technology anyway.

Category: Electromagnetic interference

Skydiving is one of the few activities where the answer is more cautious than a straightforward yes. Most cardiologists advise against it for people with an ICD, and it’s worth understanding why before making any decision.

The main concerns are:

Physical impact on landing. Even with good technique, landing places sudden mechanical stress on the body. If your leads haven’t fully settled, or if there’s any risk of the ICD shifting, this is a genuine consideration.

Altitude. Modern ICDs are tested to function at altitude, but freefall from standard jump heights (3,000-4,000m) involves rapid pressure change. Whilst this is unlikely to affect device function, it has not been formally studied in clinical settings.

Emergency access. If your ICD delivers a shock during freefall, you’ll be at altitude and potentially incapacitated. Immediate medical response would not be possible.

That said, “not advisable” isn’t the same as “absolutely prohibited.” Your specific situation (device type, underlying condition, and how well your arrhythmia is controlled) matters significantly. Any decision should be made directly with your cardiologist, and it’s also worth contacting your device manufacturer about altitude tolerance for your specific model.

For broader guidance on returning to physical activity after a cardiac arrest, visit our Exercise After Cardiac Arrest page.

Always discuss extreme sports with your cardiologist before going ahead.

Category: Implantable Devices

Airbags are great-most of the time. Unfortunately, the speed and force of airbag delivery might pose a danger to ICD patients. It likely will not damage the device itself, but there may be a danger of lead dislodgement. It just depends on your size, the type of car, and the type of airbag. Nonetheless, the immediate threat is the car accident, so it is a good tradeoff.

Category: Implantable Devices

Yes, coffee is generally safe in moderate amounts. Caffeine is a natural stimulant and can cause an increase in your heart rate, but moderate amounts should not be enough to cause any problems with your device.

Category: Implantable Devices

Yes. Electric toothbrushes have no known effect on ICDs. As with most electronic devices, keep the toothbrush and its charging base at least 15cm (6 inches) away from your device as a precaution.

Category: Implantable Devices

Yes. Swimming is safe with an ICD once you have fully healed from the implant procedure. Most people are advised to avoid swimming for around four to six weeks after implantation to allow the wound site to heal properly and to reduce the risk of lead dislodgement while the leads are bedding in.

After recovery, there are no specific restrictions on swimming for most ICD patients. If you swim in open water, it is sensible to go with a companion, as it is with any open water swimming.

If your cardiac arrest was caused by an inherited condition such as CPVT or Long QT Syndrome, where exercise or cold water can trigger arrhythmias, discuss specific restrictions with your cardiologist.

Category: Implantable Devices

Yes. Peer support — connecting with others who have direct experience of living with an ICD or surviving a cardiac arrest — is one of the most valued forms of support for many people. Hearing how others have adjusted, managed their fears, and got on with their lives can be reassuring and practical in a way that clinical information alone cannot always provide.

Sudden Cardiac Arrest UK (SCAUK) offers peer support resources for both ICD patients and cardiac arrest survivors, including co-survivors. Visit suddencardiacarrestuk.org or get in touch directly to find out what is available.

Your cardiac team or GP may also be able to point you towards local support groups or cardiac rehabilitation programmes, which often have a peer support element. The British Heart Foundation’s network of Heart Support Groups provides in-person peer support in many areas of the UK.

Category: Implantable Devices

Yes. Being in the sun and normal outdoor activities have no effect on your ICD. Standard sun safety advice applies to everyone regardless of whether they have a heart device.

Category: Implantable Devices

It’s important for any healthcare provider you see to know about your implanted devices, as well as the medical conditions that relate to them. It’s simply in your best interest. Lots of people find their ID card to be a good icebreaker when starting a conversation with a new doctor, clinician, or dentist.

Category: Implantable Devices

Wireless modems and routers are safe to use as long as you keep them at least 6 inches away from your ICD.

Category: Implantable Devices

Yes, you can use mobile phones. However, mobile phones may cause electrical interference with your heart device when the phone is turned on and held too close to your heart device. Also, some accessories for mobile phones contain magnets that may cause interference, such as earbuds or cases with magnetic clasps. Any effect is temporary, and simply moving the phone or accessory away will return the heart device to its previous state of operation.

Category: Implantable Devices

Definitely. Just keep them 6 inches away from your ICD.

Category: Electromagnetic interference

Welding with currents above 160 amps may temporarily affect normal ICD function. Check with your doctor. They might not know much about welding, but they can talk to you about interference with your ICD. Note: Aprons or vests will not effectively shield the ICD from the electromagnetic energy generated by welding equipment. Follow these safety precautions to avoid interference:

Category: Implantable Devices

Get your yard maintenance on. It’s fine to use a powered lawnmower as long as you keep some distance between the running mower and your ICD. For electric motors, stay 6 inches away. If you’re using a gas-powered mower, keep the ignition (spark plug area) at least a foot away from your heart device.

Category: Implantable Devices

Always carry your heart device ID card. This card is helpful if your heart device sets off a metal detector or a security system.

Category: Implantable Devices

Yes. Using a microwave won’t affect your ICD.

Category: Implantable Devices

In the UK, driving after receiving an ICD is governed by DVLA regulations, not solely by your doctor’s assessment.

For Group 1 licences (car and motorcycle), a driving ban of at least six months typically applies following ICD implantation. If your ICD delivers a shock that causes or could have caused incapacity, a further period of restriction applies. Once the restriction period has passed and your cardiologist confirms your condition is stable, you can usually resume driving.

For Group 2 licences (lorries and buses), the restrictions are much stricter. Having an ICD typically results in permanent revocation of a Group 2 licence in most circumstances. This can have significant implications for professional drivers.

You are legally required to notify the DVLA and your motor insurer. Your cardiologist or device clinic will advise you on when it is medically appropriate to resume driving, but the final determination is made by the DVLA. Always check the most current guidance at www.gov.uk/dvla/medicalenquiries.

Category: Implantable Devices

There might be. It depends on what your work environment is like. After receiving an ICD, you may need to be more careful while using electrical tools, appliances, or other big fancy machinery, in order to avoid device “cross-talk” called electromagnetic interference.

Category: Implantable Devices

Yes. Hand-held hair dryers can be used safely, but keep the dryer at least 15cm (6 inches) away from your device while it is running. Salon-style hood dryers — the type you sit under — are safe and do not require any special precautions.

Category: Implantable Devices

ICDs are to help you live better, not limit you. There might be a few lifestyle adjustments you need to make, but you should be able to resume most activities once your doctor has confirmed that your incision has healed.

Category: Implantable Devices

When a safety advisory or recall is issued on an ICD or pacemaker, device manufacturers are required to notify all clinicians implanting their devices. In the UK, the Medicines and Healthcare products Regulatory Agency (MHRA) coordinates device safety communications, and manufacturers are expected to notify affected patients directly or through their clinical teams.

Your device clinic will typically contact you if your device or leads are subject to an advisory. Not all advisories require the device to be replaced — many result in a change to device programming, more frequent monitoring, or simply an awareness check. Your clinical team will advise you on whether any action is required.

You can also check the MHRA’s device alerts database at www.gov.uk/government/collections/medical-device-alerts to see whether any alerts have been issued relevant to your device. If you are unsure whether your device is subject to an advisory, contact your device clinic directly.

Category: Implantable Devices

Cataract surgery is generally safe for people with ICDs and pacemakers. The procedure does not typically involve electrical equipment that would interfere with a heart device.

However, if electrocautery (an electrical current used to stop bleeding) is needed during the procedure, the surgeon and anaesthetist should be informed about your device beforehand so that appropriate precautions can be taken. Always carry your device ID card to any medical or surgical appointment and ensure the clinical team are aware of your ICD.

Category: Implantable Devices

Yes. Keep your teeth happy. Dental X-rays shouldn’t give you any problems.

Category: Implantable Devices

If an external defibrillator or AED must be used, it should be used. However, it may change the settings or damage your ICD. If external defibrillation or AED is used, the implanted device should be checked for proper settings afterward.  Consult your doctor if you ever get defibrillated externally.

Category: Implantable Devices

Don’t be all pins and needles about this one. Acupuncture is no problem, as long as it’s not acupuncture with an electrical stimulus. Electrical stimulus could be detected by your ICD, potentially resulting in an inappropriate shock.

Category: Implantable Devices

Yes, ultrasounds are safe for ICD users.

Category: Implantable Devices

RF ablation is possible, as long as correct safety protocols are followed.

Category: Implantable Devices

Usually, but it depends on the manufacturer of your ICD.

Category: Implantable Devices

Your doctor will prescribe a schedule of post-implant checkups, and they’ll just become a regular thing. At each one, the clinician will use a gizmo called a programmer that communicates with the computer chip in your ICD to check it out. It’s very simple, and it helps ensure that your device is meeting your needs, no slacking off. Often these checkups can be done at home with remote monitoring.

Category: Implantable Devices

Your doctor will know if you recieve a shock as the ICD records and stores data when therapy like a shock is delivered.

Category: Implantable Devices

No. ICDs vary in size, shape, and design depending on the manufacturer and model, and on how many leads are needed. Modern ICDs are generally smaller than older models. Your cardiologist will select the most appropriate device for your specific clinical needs. If you have a preference or a concern about device size — for example in relation to how visible it may be under your skin — raise this with your cardiologist before the procedure.

Category: Implantable Devices

ICDs deliver shocks to save your life when pacing therapies don’t return your heart to a normal rhythm. After a successful shock, your normal heart rhythm will resume.

Category: Implantable Devices

ICDs vary in size, depending on type and model. But if you’d like to bust out your ruler, the average ICD size is 2.5 inches high x 2 inches wide x 0.5 inch deep (or 64mm x 51mm x 13mm).

Category: Implantable Devices

Yes. Lead dislodgement doesn’t happen often, but it does happen.

Category: Implantable Devices

Let your doctor know if you’re worried. Allergy testing can be done – and if you need a custom device, they can order one with special coatings to prevent allergic reactions. An allergic reaction to the ICD is very rare.

Category: Implantable Devices

Your doctor plays matchmaker to set you up with the device that you’ll get along with the best. They’ll consider the device features as well as your medical condition. If you have a preference, discuss this with your doctor before the day of your surgery.

Category: Implantable Devices

The outer layer of an ICD is usually made of titanium. Titanium is considered the most attractive material for biomedical applications and is used in many different kinds of implantable medical devices such as artificial hip and knee replacements, artificial hearts, dental implants, and many others.

Category: Implantable Devices

If someone needs an ICD, age is not a limiting factor.  ICDs have been implanted in children as young as several months old.

Category: Implantable Devices

Currently, there aren’t any companies that make an ICD specifically for children. A regular ICD will perform correctly when programmed for a child, and might be implanted differently for the child’s comfort.

Category: Implantable Devices

Yes. An ICD can be turned off, but only by a doctor’s orders. This is typically done only when a person is preparing for death, usually due to another cause.

Category: Implantable Devices

The longevity of your ICD depends on how often it is used, and how it’s programmed. The typical range is 4-12 years. Say “What’s up?” to your doc for more specifics.

Category: Implantable Devices

ICDs are commonly tested for device performance and battery life. This way, you’ll know that your device is programmed correctly and when it’s ready for replacement.

Category: Implantable Devices

Battery type varies by manufacturer. For example, Medtronic ICDs use lithium silver vanadium oxide batteries.

Category: Implantable Devices

Globally, hundreds of thousands of people receive ICD implants each year. In the UK, approximately 35,000–40,000 ICDs and pacemakers are implanted annually, with ICDs accounting for a significant proportion of these. ICD implantation rates have grown steadily over recent decades as evidence for their benefit has expanded and awareness of conditions such as hypertrophic cardiomyopathy and inherited arrhythmia syndromes has increased.

Living with an ICD is something millions of people around the world do successfully — the majority returning to work, exercise, travel, and a full life after implantation. You are far from alone.

Category: Implantable Devices

As of right… … … NOW, one patient has had 12 ICDs.

Category: Implantable Devices

It is very common to feel anxious before getting a heart device. Concern about the procedure itself, about what having an ICD means for your life, and about the underlying condition that led to the recommendation are all understandable responses.

The most effective way to manage anxiety around the procedure is to get clear, reliable information — which is what this site is here to provide. Knowing what to expect before, during, and after implantation, and understanding how your ICD works and what it will and will not prevent you from doing, can significantly reduce fear of the unknown.

If your anxiety is significant or persistent, do speak to your GP or cardiac team. Psychological support is available, and you do not need to manage this alone. Peer support — talking to others who have been through the same procedure — is also highly valued by many people. Contact SCAUK to find out more.

Category: Implantable Devices

Before your ICD implant, ask that doctor of yours what medications you’re allowed to take. It might be necessary to stop some of them before the procedure. For example, it’s common for people with diabetes to adjust their medications.

Category: Implantable Devices

An ICD can be programmed to deliver several types of therapies.  They can act as a standard pacemaker, deliver high-energy shocks, and deliver rapid pacemaker-like therapy to break up fast heart rhythms.

Category: Implantable Devices

An ICD is made up of a small titanium can and at least one soft insulated wire lead. The titanium can holds the electronics, a built-in lithium battery and the high-voltage capacitors needed for a shock. The leads carry electrical impulses from the defibrillator to the heart, as well as information back from your heart so the defibrillator knows what it is doing..

Category: Implantable Devices

Infection isn’t all that common. Studies show a 1%-2% infection rate following implant.

Category: Implantable Devices

No. Shaving is typically done by the highly trained surgical personnel before the procedure. Enjoy!

Category: Implantable Devices

Not really. Sedation/anesthesia is used for the procedure. You might be slightly awake, but you shouldn’t feel anything. You probably won’t remember anything either.

Category: Implantable Devices

The incision for an ICD implant is typically around 5–7cm long and is usually made just below the collarbone. It does leave a scar, and the ICD itself creates a small visible or palpable bulge under the skin.

Everyone heals differently. In most people the scar fades and becomes less noticeable over time, though it rarely disappears completely. How prominent the bulge is depends on the size of the device and your individual build.

Some people find the visible reminder of the device emotionally difficult at first. This is entirely understandable and, for most people, becomes easier to live with over time. If you have significant concerns about the appearance of the scar or device, your GP or cardiac nurse can discuss options and refer you for support if needed.

Category: Implantable Devices

It usually takes about 2-3 days before you can resume everyday activities. Your doctor will tell you more, as some activities may be limited for several more weeks to allow time for a full recovery. Patience is a virtue.

Category: Implantable Devices

Following ICD implantation, you will typically be advised not to lift heavy objects or raise the arm on the side of your implant above shoulder height for four to six weeks. This is for two reasons.

First, the incision site needs time to heal without being put under physical strain. Second, and more importantly, the leads need time to become securely anchored in the heart wall — a process called lead maturation. Vigorous arm movement and heavy lifting in the early weeks can dislodge a lead before it has properly bedded in, which would require the procedure to be repeated.

Your clinical team will advise you on the specific restrictions for your situation. Most people can gradually return to normal arm movements and light activity within a few weeks, with heavier lifting and overhead activity following at six to eight weeks.

Category: Implantable Devices

Most people are discharged home the day after ICD implantation, once the clinical team is satisfied with the device function and the implant site. In straightforward cases, some centres discharge patients on the same day.

If new leads were implanted, or if there were any complications during the procedure, a slightly longer stay may be required. Your clinical team will advise you on what to expect based on your specific situation.

Category: Implantable Devices

You will be monitored in the procedure area/recovery room until you are fully awake. Monitoring typically includes heart rate and rhythm, blood pressure and oxygen level until you are fully awake and then, depending the facility, you may be transferred to a short-stay unit or cardiac area for several hours to overnight before being discharged.

Category: Implantable Devices

Risks can include, but are not limited to, infection, bleeding, punctures to the lung, heart, or vein during lead insertion, swelling and bruising at the implant site. Talk with your doctors about your risk factors.

Category: Implantable Devices

First, an incision is made just below the collarbone. Then leads are inserted and attached to the heart, and then tested to make sure they’re working right. The leads are then connected to the ICD and everything is placed under the skin. Finally, the incision is closed up and you’re all done.

Category: Implantable Devices

You know it better as a pacemaker. An implantable pulse generator provides timed electrical stimuli to the heart. It’s one part of a three-part system: the pacemaker with the electronics and power source, your heart, and the leads that connect the two.

Category: Implantable Devices

Yes. Gas powered snow blowers can be used. It is recommended that you keep at least 12 inches between the running motor and the ICD.

Category: Implantable Devices

Yes, you can. But keep it at least a foot away from your chest, which you’d probably do anyway.

Category: Implantable Devices

Yes. Sexual activity is a normal and important part of life, and having an ICD shouldn’t stop you.

From a physical standpoint, sex is roughly equivalent in exertion to climbing two flights of stairs, moderate activity that most people with ICDs can manage comfortably once they’ve recovered from their procedure. Your cardiologist will advise when it’s safe to resume, typically once you’re comfortable with light to moderate physical activity.

A common worry is whether a shock during sex could harm a partner. The honest answer: it’s extremely unlikely to cause any harm. If your ICD were to deliver a shock, a partner in physical contact might feel a mild tingle, but not a painful or dangerous shock. This is a widely asked question and one worth discussing openly with your care team if it’s causing anxiety.

Many people find that worry about the ICD itself affects confidence more than any physical limitation, and that is completely normal. SCA UK’s peer support community includes people who’ve navigated exactly these concerns. You’re not alone in having them.

Full guidance on intimacy and ICDs, including information for partners, is on our Sex and Intimacy After Cardiac Arrest page.

If you have specific concerns about your situation, speak to your cardiologist or specialist nurse.

Category: Implantable Devices

A combination of several factors may put people at risk for a life-threatening arrhythmia. This includes prior heart attacks, reduced heart function, advanced heart failure and spontaneous VT or VF that is not due to a transient or reversible cause.

Category: Implantable Devices

An ICD monitors a person’s every heartbeat around the clock. If the heart rate is too fast or too slow, the ICD automatically sends small, painless electrical signals to correct it. If that doesn’t do the trick, the defibrillator delivers a shock to restore the heart to a normal rate.

Category: Implantable Devices

Yes, you can stay toasty under your electric blanket without harming your ICD.

Category: Implantable Devices

A magnetic resonance imaging (MRI) scan is a type of diagnostic that creates an internal view of your body. The energy fields present during an MRI scan may harm a traditional heart device, which could endanger a patient’s health.

Category: Implantable Devices

Most likely, yes. ICDs have been proven to terminate 98% of potentially life-threatening arrhythmias.

Category: Implantable Devices

If at any time you receive an appropriate shock from your ICD i.e. one that is correcting a potentially fatal arrhythmia, you must surrender your licence and stop driving for 6 months.  

If you were incapacitated i.e. went unconscious whilst you received the shock the suspension is 2 years. This may be reduced to 6 months if your cardiologist takes steps to prevent any further events requiring a shock eg starting or adjusting medications.

If you receive an inappropriate shock i.e. the shock was unnecessary, then you will receive a 1 month suspension.

If you are driving whilst you receive a shock you should stop as soon as is safe to do so, and should not continue until the cause of the shock has been investigated.

For more information about shocks see our ICD shocks page.

Category: Implantable Devices

The date of your suspension will usually start from the date that you have any remedial work or get a formal diagnosis of a condition, not necessarily the date of your cardiac arrest.

For example, if you have a cardiac arrest and 2 weeks later get an ICD implant, then the suspension will start from the date of the implant, not the arrest.

If you have a heart attack as the cause of your cardiac arrest, the problem is often looked at and dealt within a short time frame (same day) so the suspension will start from that day.

Category: Implantable Devices

It will largely depend on your individual circumstances and medical conditions but common suspension periods are as follows:

If you had a heart attack as the cause of your cardiac arrest and it was remedied with medications and/or stents then the suspension period is 1 month.

If you had to have an ICD fitted then the suspension period will be 6 months from the date of the implant. If you have any shocks further suspensions will apply and the length will vary depending on a number of factors. See “Can I drive if I get a shock from my ICD” for more information.

You may also have to temporarily stop driving if your anti-arrhythmic medications are changed, typically for 1 month.

If your driving licence was revoked you’ll have to wait until all medical enquiries are complete. You will also need to have your driving licence back before you can start driving again.

You can check the DVLA information for medical professionals regarding assessing fitness to drive here, and this shows the rules regarding whether you can drive or not and if not, for how long.

Category: Implantable Devices

This is one for your doctor.

You should be assessed by your doctor using these guidelines which determine the rules for assessing drivers with cardiac conditions.

Many of the conditions listed will mean that there will be some period of suspension, but you may be allowed to drive again if you can meet certain conditions including assessment by a specialist cardiologist.

However, if you have an ICD implanted you will not be able to drive an HGV or commercial vehicle.

Category: Implantable Devices