Your heart works 24 hours a day to make sure that your body gets healthy blood full of oxygen. Your heart gets its own supply of blood through your coronary arteries. A heart attack happens when a coronary artery gets blocked, because this stops your blood from flowing properly into your heart muscle. Cells in the heart muscle that are deprived of oxygen-rich blood begin to die.
A block in your coronary artery can be caused in two ways:
Some heart attacks might not affect how your heart works, but other heart attacks can stop your heart from pumping blood the way it’s supposed to.
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