What causes a myocardial infarction?

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A myocardial infarction is caused by an occlusion (blockage) in the coronary arteries. This occlusion is caused by a blood clot in a coronary artery. This blood clot is the result of a build up of fat deposits. These aggregate in the artery and then harden, resulting in a plaque in the artery wall. This then causes atherosclerosis, which make it more difficult for the red blood cells to pass through the artery. This can cause a blood clot that ultimately leads to a myocardial infarction.

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