Heart-attack definition

Sudden interruption or insufficiency of the supply of blood to the heart, typically resulting from occlusion or obstruction of a coronary artery and often characterized by severe chest pain.
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Sudden interruption or insufficiency of the supply of blood to the heart, typically resulting from occlusion or obstruction of a coronary artery and often characterized by severe chest pain.
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(figuratively) Death or failure.

My computer had a heart attack when I tried to get it to run that program.

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Any sudden instance of the blood supply to the heart muscle itself becoming inadequate, resulting in heart muscle damage: often a result of a coronary thrombosis.
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Necrosis of a region of the heart muscle caused by an interruption in the supply of blood to the heart, usually as a result of occlusion of a coronary artery resulting from coronary artery disease . Symptoms typically include sudden, crushing chest pain, nausea, and sweating. Characteristic changes in the electrocardiogram are used to diagnose heart attacks.
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An acute myocardial infarction, sometimes fatal, caused by the sudden occurrence of coronary thrombosis, which obstructs the blood supply to the heart and leads to necrosis of heart muscle tissue.
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Other Word Forms

Noun

Singular:
heart-attack
Plural:
heart-attacks