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, tens of thousands of 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
Q: The study found that older survivors had more physical problems and younger survivors had more anxiety. Why would age make such a difference?
After a cardiac arrest, the body and mind both go through a significant recovery process. For older survivors, the arrest can accelerate or worsen physical decline that was already beginning, making mobility, self-care and daily activities noticeably harder. 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. These are genuinely different experiences of the same event, shaped by age and life stage.
Q: If the overall scores looked fine, how do we know there was really a problem?
A: That is exactly the point the research is making. When doctors 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. In this study, the overall scores varied little between age groups. But when the researchers looked at specific areas such as mobility, self-care, usual activities and anxiety separately, clear and significant differences appeared. The overall score masked what was actually going on.
Q: Nearly 30% of younger survivors showed signs of anxiety. Is that surprising?
A: It is higher than you might expect, particularly given that younger survivors tend to have fewer physical problems and are often considered to be “doing well.” Surviving a cardiac arrest at a young age can be deeply distressing. There is the shock of the event itself, the disruption to work and family life, the ongoing uncertainty about heart health, and the psychological challenge of facing your own mortality at an age when most people do not expect to. Anxiety is a natural and common response, but it can go undetected if doctors are only looking at physical recovery.
My follow-up appointments focus mostly on my heart. Should they also cover how I am feeling mentally?
Yes, based on this research and international guidelines, they should. Mental health screening, including assessment for anxiety and depression, is recommended as part of post-cardiac arrest care by bodies including the National Institute for Health and Care Excellence (NICE) and the European Resuscitation Council. If your appointments have not included this kind of discussion, it is worth raising with your cardiologist, GP or cardiac rehabilitation team. You do not have to wait to be asked.
Q: The study is from Denmark. Does it apply to people in the UK?
A: The underlying findings are broadly relevant. The physical and psychological challenges of recovering from cardiac arrest are not specific to any country. Older survivors everywhere face the risk of increasing physical limitations, and younger survivors everywhere can struggle with anxiety and psychological adjustment. The specific numbers may vary slightly in different healthcare settings, but the core pattern is consistent with other research from Europe and beyond.
Q: What should good follow-up care after cardiac arrest actually look like, according to this research?
A: The research suggests that follow-up should be tailored to the individual rather than relying on a standard set of tests that produce a single score. For older survivors, good follow-up would include a careful assessment of physical functioning, independence, and daily activities. For younger survivors, it would include a deliberate focus on psychological well-being, anxiety screening and support for social and occupational recovery. For all survivors, it should treat quality of life as having several distinct dimensions, not a single measure.
Q: I survived a cardiac arrest, and I do not feel like I am back to normal. Is that common?
A: It is very common, and it is important to say so clearly. Research consistently shows that many cardiac arrest survivors live with lasting effects, whether physical, cognitive or psychological, even when their clinical results look reassuring. Feeling that something has changed, that you tire more easily, worry more, or simply cannot quite get back to who you were before, is a recognised part of survivorship. It does not mean something has been missed medically. It means recovery is complex, and you deserve support that reflects that complexity.
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.