I used to work as an ambulance driver, and people with heart attacks often had no idea. One time a patient even called a doctor, who visited him at home and tol

I used to work as an ambulance driver, and people with heart attacks often had no idea. One time a patient even called a doctor, who visited him at home and told him it's probably just a stomach bug, but he should get it checked out in the hospital just to be sure. I was driving with an experienced colleague, who looked at the patient and said, that's no stomach bug. Turned out to be a severe heart attack, they immediately rushed him to the cardiac catheter lab at the hospital. Anyway, people die from heart attacks all the time because they don't realise what's going on before it's too late.