heart attack

heart attack

noun Pathology.
damage to an area of heart muscle that is deprived of oxygen, usually due to blockage of a diseased coronary artery, typically accompanied by chest pain radiating down one or both arms, the severity of the attack varying with the extent and location of the damage; myocardial infarction.


Origin:
1925–30

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Collins
World English Dictionary
heart attack
 
n
any sudden severe instance of abnormal heart functioning, esp coronary thrombosis

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

heart attack n.
Acute myocardial infarction typically resulting from an occlusion or obstruction of a coronary artery and characterized by sudden, severe pain in the chest that often radiates to the shoulder, arm, or jaw.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
heart attack  
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. Also called myocardial infarction.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

heart attack definition


An episode of heart failure or the stopping of normal heart function; a coronary thrombosis. Symptoms of a heart attack include pain and pressure in the chest, which often spread to the shoulder, arm, and neck. Today, physicians tend to define heart attack in terms of muscle damage to the heart caused by oxygen deprivation.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

heart attack

death of a section of the myocardium, the muscle of the heart, caused by an interruption of blood flow to the area. A heart attack results from obstruction of the coronary arteries. The most common cause is a blood clot (thrombus) that lodges in an area of a coronary artery thickened with cholesterol-containing plaque due to atherosclerosis.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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