Overview
The heart is a complex, highly specialized, muscular organ in the chest that maintains the circulation of blood throughout the body. Heart attack, or acute myocardial infarction, is the death of heart tissue caused by a complete blockage in one of the arteries that supply blood to the heart (coronary arteries), resulting in an interruption in the blood supply to the heart.
When heart tissue is deprived of blood-borne oxygen for longer than 30 minutes (called ischemia), it begins ...Read the full article
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Overview, Signs, Symptoms, and What to Do
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