Stress causes heart attacks is the headline version of a relationship that’s actually more nuanced – and understanding the nuance matters, because it changes what’s actually worth doing about it.
Acute, sudden severe stress can trigger real cardiac events. Takotsubo cardiomyopathy – sometimes called broken heart syndrome – is a genuine, if temporary, weakening of the heart muscle following intense emotional shock, and severe stress can also trigger a heart attack in someone with existing significant artery disease. So the link is real, not imagined.
Chronic, everyday stress works differently and more slowly. It’s not a direct trigger in the same way, but it influences the things that are direct risk factors: it raises blood pressure, it’s linked to poorer sleep, it often accompanies less physical activity and less careful eating, and for some people it’s tied to smoking or excess alcohol as a coping mechanism. Stress, in other words, tends to act through other risk factors rather than around them.
This matters for what you actually do with the information. Managing stress well is genuinely worthwhile for heart health – but the specific, measurable levers are usually blood pressure, sleep, activity, alcohol, and smoking. If chronic stress is affecting your life, it’s worth addressing directly and personally, not just as a heart health project.
If you’re noticing chest pain, breathlessness, or a racing heart during stressful periods, that’s worth investigating properly rather than assuming it’s just stress – the two things aren’t mutually exclusive, and it’s better to check.