A landmark Danish study of 2,500 cardiac arrest survivors reveals a troubling blind spot: the tools doctors use to assess recovery may be hiding how differently people are actually doing.
Every year, several thousand people in the UK survive a cardiac arrest. They beat the odds. Their hearts restart. They go home. And then, quietly and often invisibly, many of them struggle.
For decades, doctors have judged recovery by asking one broad question: Is this person doing well, overall? A new body of research suggests that question is not nearly good enough. It may, in fact, be hiding some of the most important things happening to survivors and leaving them without the targeted support they need.
A landmark Danish study, published in the journal Resuscitation, followed 2,552 survivors of out-of-hospital cardiac arrest over an average of five and a half years. What the researchers found challenges assumptions that have quietly shaped survivorship care for a generation.
The Headline Finding: Age Changes Everything
The study, led by Dr Victoria Gunmalm and colleagues at Aalborg University in Denmark, looked at survivors across six age groups, from under 35 to over 75. Three well-established quality-of-life questionnaires were used to assess survivors’ well-being. The results painted strikingly different pictures depending on how old a survivor was when their heart stopped.
Older survivors, particularly those aged 75 and above, reported sharply higher rates of physical difficulty. More than half (56%) had problems with basic mobility. Just over half (55%) struggled with their usual daily activities. Nearly a quarter (23%) had difficulties with self-care tasks such as washing and dressing.
Younger survivors told a different story. Their physical limitations were far fewer. But their rates of anxiety were significantly higher. Among those under 35, nearly 30% showed possible or high levels of anxiety. That figure fell steadily with age, dropping to around 13.5% in the oldest group.
In simple terms, older survivors were grappling with their bodies. Younger survivors were grappling with their minds. This mirrors what many in our community have shared with us over the years, as explored in our posts on emotional changes after cardiac arrest and the emotional impact of cardiac arrest on women.
The Problem: The Standard Tests Did Not Show Any of This
This is where the research becomes particularly important, and for many survivors, perhaps validating.
When the researchers looked at the standard summary scores, the single-number tools that doctors most often use to assess overall quality of life, they found almost no difference between age groups. The numbers looked reassuringly similar across the board. On paper, everyone appeared to be doing roughly equally well.
But that was a statistical illusion. When the researchers looked at individual areas of wellbeing, such as mobility, self-care, daily activities, anxiety and depression, the differences between age groups were stark.
“Summary measures may make meaningfully different survivorship burdens appear deceptively similar,” wrote researchers Fangfang Huang and Jiaqi Shen in a commentary published alongside the study. Their point was direct: a single “good outcome” score can be clinically convenient whilst being profoundly misleading for the person living that outcome.
The Danish team agreed. In their published reply, Gunmalm and colleagues acknowledged that single composite scores “can obscure clinically meaningful survivorship burdens across the lifespan.” A 67-year-old with limited mobility and a 32-year-old with persistent anxiety may score identically on a summary scale. But they are not having the same experience of survival at all.
What This Means for Survivors
For anyone who has survived a cardiac arrest, this research may feel like a familiar truth finally being spoken aloud in the language of science.
Older survivors are often quietly dealing with a gradual loss of independence. Finding the stairs harder. Tiring more easily. Needing more help than before. These changes can be difficult to connect clearly to the arrest itself, particularly when a doctor sees a decent overall score and moves on.
Younger survivors frequently carry an invisible weight. The sudden, visceral knowledge that their heart stopped. That the world carried on whilst they were, technically, dead. That it could happen again. For those in their twenties, thirties or forties, perhaps with young children, a demanding job, a mortgage and decades of plans, the psychological toll can be severe and long-lasting. Yet a global score may not flag any of this. The unseen journey of recovery is something our community knows well, and the psychological aftermath can extend to those who witnessed or responded to the arrest too.
Neither group is well served by a single number.
The Bigger Picture: A System Catching Up
This research arrives at a moment when international guidelines from the European Resuscitation Council are increasingly emphasising rehabilitation and long-term care after cardiac arrest, not just discharge rates and survival statistics. We discussed some of these developments in our recent conversation with Professor Jerry Nolan on the state of resuscitation in 2026, and SCA UK members contributed to the 2025 ERC guidelines consultation.
The study reinforces something that cardiac arrest survivor communities have been saying for years: survival is not the same as recovery, and recovery is not one thing. It is physical, psychological, social and cognitive. It changes over time. And it looks fundamentally different depending on who you are.
The practical message is straightforward. Older survivors need early, structured assessment of how they are managing physically, including their ability to move around, care for themselves and live independently. Younger survivors need deliberate, compassionate attention to their mental health, their anxiety levels and their ability to re-engage with the lives they had before the arrest. The CARESS pilot support programme and the work of Dr Nathan Pearson on survivorship care after cardiac arrest are exactly the kind of tailored approaches this research calls for. The NHS cardiac rehabilitation programme is also a starting point worth discussing with your GP or cardiologist.
A one-size-fits-all follow-up pathway is simply not enough.
The Study’s Limitations, and Why the Direction of Travel Is Right
The researchers are admirably open about the study’s limitations. It offers a snapshot rather than a film. It captures where survivors are at one moment in time, but cannot trace how they arrived there or how they will progress. Older survivors who responded are, almost by definition, a resilient group. Many of their peers will not have survived long enough to take part, which may make the data for older age groups look slightly rosier than the full picture.
Response rates were lower among younger survivors, adding further uncertainty. And separating the effects of the cardiac arrest itself from the effects of normal ageing, particularly in the oldest participants, remains genuinely difficult.
None of these limitations undermines the core finding. They simply point the way towards the next study, not away from this one. The signal is clear. The direction is right.
A Note on What Survivors and Co-Survivors Already Know
For those living with the aftermath of cardiac arrest, whether as a survivor or a co-survivor, much of this research may land as confirmation of what daily life has already taught you. The experience of co-survivors is explored honestly in our podcast episode championing co-survivors with Kristin Flanary.
You already know that “you’re doing well” from a clinical point of view and “you’re doing well” as a felt experience are not always the same sentence. You already know that a good echocardiogram does not prevent a panic attack, and that walking to the end of the street is harder than it used to be, and that both of those things matter.
Research like this matters because it begins to put numbers around what survivors have been saying for years. And when those numbers appear in journals read by cardiologists, rehabilitation specialists and policymakers, they carry weight that individual stories, however powerful, sometimes cannot. This is also why SCA UK’s role in the international research conversation matters so much.
Frequently Asked Questions
After resuscitation, will the survivor be able to resume a normal life?
Most people who survive a cardiac arrest can return to their previous level of functioning, though the timeline varies and recovery often continues for a year or more. Cognitive and psychological recovery commonly takes longer than physical recovery.
All survivors need ongoing follow-up care with a cardiologist or electrophysiologist. This typically includes regular device checks if an ICD has been fitted, review of any medication, and assessment of how recovery is progressing. Cardiac rehabilitation is also recommended and has good evidence for improving outcomes.
What is SCA UK and how can it help me?
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.
Why would age make such a difference to recovery after cardiac arrest?
After a cardiac arrest, both the body and mind go through a significant recovery process. The difference age makes comes down to what each group is most vulnerable to at that stage of life.
For older survivors, a cardiac arrest can accelerate or worsen physical decline that was already beginning. Mobility, self-care and the ability to carry out daily activities can all become noticeably harder. These changes may seem gradual, and it is not always easy to connect them clearly to the arrest, particularly when overall clinical scores look reassuring.
For younger survivors, the psychological impact tends to dominate. Being young and otherwise healthy, then experiencing a sudden, life-threatening event, can trigger intense anxiety and a lasting fear that it will happen again. There is also the disruption to work, family life and long-term plans that older survivors may be less reliant on in the same way.
A major Danish study of 2,552 survivors found that older survivors (particularly those over 75) reported significantly higher rates of physical difficulty, while those under 35 showed anxiety levels of nearly 30%. These are genuinely different experiences of the same event, shaped by age and life stage — and they call for different types of support.
If my recovery scores look normal, how can there still be a problem?
This is exactly the point that recent research has highlighted. When clinicians use a single overall score to measure how a survivor is doing, it can average out very different problems and make everyone appear roughly similar on paper.
In a large Danish study of over 2,500 survivors, the overall quality-of-life scores varied little between age groups. On a summary measure, older and younger survivors looked broadly comparable. But when researchers examined individual areas — mobility, self-care, usual activities, anxiety and depression — clear and significant differences between age groups appeared.
As the study’s commentators put it, summary measures can make meaningfully different survivorship burdens appear deceptively similar. A 67-year-old with limited mobility and a 32-year-old with persistent anxiety may score identically on a composite scale. But they are not having the same experience of survival.
This matters practically. If your doctor sees a reassuring overall score and moves on, real difficulties in specific areas can go unaddressed. If you feel something is wrong but have been told your scores look fine, you are right to push for a more detailed conversation about how you are actually living day to day.
Should my cardiac arrest follow-up cover my mental health, not just my heart?
Yes, based on current research and international guidelines, they should.
Mental health screening — including assessment for anxiety and depression — is recommended as part of post-cardiac arrest follow-up care by the National Institute for Health and Care Excellence (NICE) and the European Resuscitation Council. Psychological distress is common after cardiac arrest, affecting an estimated 15 to 30% of survivors, and can be just as disabling as physical limitations.
In practice, many follow-up appointments focus primarily or exclusively on cardiac function — the echocardiogram, the device check, the heart rhythm. While these are important, they tell your clinical team very little about how you are managing your anxiety, your sleep, your ability to return to work, or your fear of a recurrence.
If your appointments have not included a conversation about your mental health or psychological wellbeing, it is worth raising this yourself. You might say: “I’ve been struggling with anxiety since the arrest” or “I don’t feel like myself — is there support available?” Your GP, cardiologist or cardiac rehabilitation team can make referrals to psychological support services.
You do not have to wait until things reach crisis point. Raising concerns early leads to better outcomes.
Take Action
If you are a cardiac arrest survivor: You deserve follow-up that reflects your whole experience, not just your heart function. Ask your care team about psychological support, rehabilitation and quality-of-life assessment. You are not done simply because you survived.
If you are a co-survivor, supporting someone who has had a cardiac arrest: Listen to what they say about how they are actually living, not just how their tests look. Encourage them to raise concerns with their clinical team, and consider connecting with the SCA UK community for peer support.
If you work in cardiac care: This research supports a move towards age-tailored, domain-specific survivorship assessment. A single summary score is not sufficient. Consider how your service addresses the distinct needs of older survivors managing physical decline and younger survivors managing psychological trauma.
Join the conversation and find peer support at Sudden Cardiac Arrest UK, or consider joining Friends of SCA UK, our dedicated membership community for survivors and co-survivors
This article is based on: Gunmalm V et al. “Quality of life after out-of-hospital cardiac arrest: age matters.” Resuscitation 223 (2026) 111092. https://doi.org/10.1016/j.resuscitation.2026.111092
Plain-language commentary produced for cardiac arrest survivor education. Not a substitute for individual medical advice.
After our first meet-up in February 2015, I realised I was not alone. It was the first time since my cardiac arrest the previous year that I had spoken face-to-face with someone who had experienced what I had. This was also true for my wife, who also happened to be my lifesaver. From that meet-up, the idea of SCA UK was born. Since then, we have achieved a considerable amount, primarily providing information, resources and support to others in a similar situation but also raising the profile of survivorship and the need for better post-discharge care. We are starting to get traction in this, and with the formation of the charity, I genuinely believe we have a bright future ahead and will make a significant difference in the lives of many who join our ranks.
Cardiac Rehab was transformative for me . In 8 weeks I moved from being a submissive, dependent and nervous sofa occupant to an ordinary man attending a gym, driving independently and having confidence and reassurance to inspire and calm those who worries about me .
Cardiac Rehab gave me back my life . I now ride a motorbike again and have a full and interesting life dedicated to being happy and helping others .