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What is the most common cause of heart attack?
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The most common cause of a heart attack is coronary artery disease. This occurs when plaque builds up in the arteries that supply blood to the heart, causing them to narrow and become blocked. When this happens, the heart has to work harder to pump blood around the body. This can cause chest pain (angina) or other symptoms such as shortness of breath, nausea, and lightheadedness.