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.
Some of the effects of cardiac arrest are visible — a scar, a device, a medication. Others are invisible. Cognitive changes such as slower processing, difficulties with memory or concentration, and fatigue that does not match how you look from the outside are all commonly reported. So is a persistent sense of anxiety, hypervigilance about your own body, or a changed relationship with the future.
These experiences are not a sign of weakness or failure to recover. They are normal responses to an event in which your heart stopped.
If you are not feeling back to normal, it is worth raising this with your GP or cardiac team rather than waiting to see if it resolves. You deserve support that reflects the full complexity of what you have been through, not just a reassuring scan result.