Symptoms of a heart attack on October 23, 2020 A heart attack (myocardial infarction or MI) is a serious medical emergency in which the supply of blood to the heart is suddenly blocked usually by a blood clot. +
How to spot and treat a heart attack on October 23, 2020 A heart attack happens when there is a loss of blood supply to part of the heart muscle. It often results from a blockage in a nearby artery. +