Trauma After Cardiac Arrest: Understanding Your Response

Cardiac arrest is a traumatic event. The body and mind experience it as a direct threat to survival, and the responses that follow — fear, hypervigilance, intrusive memories, emotional numbness — are not signs of weakness. They are normal human reactions to an abnormal experience. Understanding trauma after cardiac arrest is often the first step towards feeling better.

This page is for survivors and for the people who love them. It explains what trauma is, how it shows up after cardiac arrest, and what kinds of support can help. You do not need a formal diagnosis to find this information useful. If you are supporting someone who has had a cardiac arrest, our I Care leaflet is written specifically for you.

What Is Trauma?

Trauma is not simply a distressing event. Trauma is what happens inside you as a result of what happens to you. It is the lasting impact on your sense of safety, your relationship with your body, and your ability to trust the world around you. Two people can live through the same event and be affected very differently — and both responses are valid.

A cardiac arrest meets every definition of a traumatic experience. It arrives without warning. It involves a direct threat to life. It often involves loss of consciousness, waking in unfamiliar surroundings, and a prolonged period of uncertainty. For co-survivors — the people who witnessed the arrest — it can be equally, or in some ways more, traumatic. The Mind guide to trauma offers a helpful broader introduction if you are new to the concept.

How Trauma Shows Up After Cardiac Arrest

Trauma after cardiac arrest does not always look the way people expect. It is not always tearfulness or visible distress. Instead, it often shows up in ways that can be confusing — both to survivors and to those around them.

Common responses include:

Hypervigilance — a heightened alertness to physical sensations, a constant scanning for signs that something is wrong. This can feel like anxiety that has no obvious cause.
Intrusive memories — fragments of the experience returning uninvited, as images, physical sensations, or sudden waves of fear.
Avoidance — steering away from anything that feels associated with the arrest. This might include hospitals, certain places, or conversations about what happened.
Emotional numbing — feeling cut off from emotions, or from the people closest to you. Some survivors describe feeling like a different person.
Irritability or anger — which often sits on top of fear. When someone feels frightened and unable to control their environment, frustration is a natural response.
Changes in how you see the world — a shaken sense of safety, or a changed relationship with mortality and meaning. Some survivors also report near-death experiences that can be difficult to process.

These responses are not a sign that something has gone wrong with your recovery. They are signs that your nervous system is trying to protect you from something it experienced as life-threatening. Over time, and with the right support, they can ease significantly.

Co-Survivors Are Affected Too

Partners, family members, and close friends who witnessed a cardiac arrest — or who arrived shortly after — are often deeply affected. Witnessing someone you love collapse and require resuscitation is a traumatic experience in its own right. Co-survivors frequently report symptoms that mirror those of the person who had the arrest: anxiety, intrusive memories, hypervigilance, and difficulty sleeping.

This is often unacknowledged. The focus of clinical care is naturally on the survivor. Co-survivors may not feel entitled to their own distress, or may suppress it in order to be strong for their loved one. Both things matter. Both deserve support. Our I Care leaflet is written directly for co-survivors, and our community welcomes them too.

“What Happened to You” — Not “What Is Wrong With You”

One of the most important shifts in understanding trauma is this: trauma is not a disorder you have. It is a response to something that happened to you. This distinction matters enormously.

Traditional approaches to mental health often focus on diagnosing and treating what appears to be wrong with an individual. A trauma-informed approach asks a different question: given what you have been through, does this response make sense? Almost always, the answer is yes.

Trauma responses are, at their root, survival responses. The nervous system learned — correctly — that something life-threatening had happened. It is now trying to protect you from it happening again. The difficulty is that those protective responses can persist long after the immediate danger has passed, and can interfere significantly with daily life and recovery. The Royal College of Psychiatrists has accessible information on why trauma responses persist and what can be done about them.

When Trauma Becomes PTSD

Post-traumatic stress disorder (PTSD) is a recognised clinical condition that can develop after a traumatic experience. Research suggests that between 20% and 30% of cardiac arrest survivors experience significant PTSD symptoms. However, many more experience some trauma responses without meeting the full diagnostic criteria for PTSD.

You do not need a diagnosis to seek or receive support. If your trauma responses are affecting your quality of life — your sleep, your relationships, your ability to work or to do the things you value — that is reason enough to ask for help. NICE guideline NG116 sets out the recommended treatments for PTSD in the UK, and is useful if you want to understand what evidence-based care should look like.

See our dedicated page on PTSD after cardiac arrest for more detail on symptoms, diagnosis, and treatment. Depression after cardiac arrest often co-occurs with trauma and is also worth reading.

What Helps

Recovery from trauma after cardiac arrest is possible. It rarely happens by itself — most people need some form of support — but it does happen, and many survivors go on to describe a genuine sense of post-traumatic growth: a deeper appreciation of life, stronger relationships, and a clearer sense of what matters to them.

Things that can help include:

Talking therapies — particularly trauma-focused cognitive behavioural therapy (TF-CBT) and EMDR (Eye Movement Desensitisation and Reprocessing), both of which have strong evidence for trauma recovery. The EMDR Association UK has a directory to help you find an accredited therapist.
Peer support — connecting with others who have lived through similar experiences. Being genuinely understood by someone who knows what cardiac arrest feels like from the inside is itself therapeutic. Join the SCA UK community to connect with survivors and co-survivors across the UK.
Relational support — the quality of your close relationships matters. Feeling safe with the people around you, and feeling that your experience is acknowledged rather than minimised, supports recovery. Our Mental Health Well-being leaflet is a useful resource to share with those around you.
Pacing and self-compassion — recovery is not linear. There will be harder days and easier ones. Treating yourself with the patience you would offer someone else in your situation is not indulgent — it is part of getting better.

Your GP is the starting point for accessing NHS psychological therapies. You can also self-refer to NHS Talking Therapies (formerly IAPT) in most areas of England without a GP referral. For further support options, visit our Get Support pages.

You Are Not Alone

Trauma after cardiac arrest is common, understandable, and treatable. Many survivors carry it in silence, not realising that what they are experiencing has a name — or that support exists. If this page has described something you recognise in yourself, please know that you are not alone, and that what you are feeling makes complete sense.

The SCA UK community includes thousands of survivors and co-survivors who understand, from their own experience, what it is to live in the aftermath of cardiac arrest. Join us — it is free, private, and open to anyone affected by cardiac arrest. You can also support our work and help us reach more survivors through Friends of SCA UK.