How common are heart attacks, and are they the same thing as myocardial infarctions?
More than 1 million Americans have heart attacks each year. A heart attack, or myocardial infarction (MI), is an event that causes permanent damage to the heart muscle. "Myo" means muscle, "cardial" refers to the heart, and "infarction" means death of muscle tissue due to lack of blood and oxygen supply.
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