Mar 08, 2019 · A heart attack—or myocardial infarction—happens when blood flow is cut off from the heart abruptly. A blockage in at least one coronary artery is usually the cause. The American Heart Association recommends a daily low-dose aspirin for people who are at high risk of a heart attack or who have already had a heart attack or stroke. But first, ask your doctor. The warning signs of heart attack vary. Symptoms can start suddenly, or develop over time and get progressively worse. People can have just one symptom or a combination of symptoms. The patient can feel discomfort or pain in the centre of the chest.
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