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What is a myocardial infarction?

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A myocardial infarction (heart attack) is precipitated when the interior passage of an artery, usually already narrowed by atherosclerosis (see arteriosclerosis ), is completely blocked by thrombosis (blood clot) or arterial plaque.

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Get more facts and information about coronary artery disease . Or, view the full encyclopedia entry from The Columbia Encyclopedia, Sixth Edition.

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