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en.wikipedia.org/wiki/Myocardial_infarction

Myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops to a part of the heart, causing damage to the heart ...

www.heart.org/HEARTORG/Conditions/HeartAttack/Heart-Attack_UCM_001092_SubHomePage.jsp

What is a heart attack, also called a myocardial infarction? What is coronary heart disease and coronary artery disease? The American Heart Association ...

www.heart.org/HEARTORG/Conditions/HeartAttack/WarningSignsofaHeartAttack/Warning-Signs-of-a-Heart-Attack_UCM_002039_Article.jsp

Sep 29, 2016 ... What are the warning signs of a heart attack? The American Heart Association explains the most common symptoms of heart attack in men and ...

www.medicalnewstoday.com/articles/151444.php

Jul 26, 2017 ... What are the main causes of a heart attack? Find out here along with the information about the causes, symptoms, and most common ...

www.webmd.com/heart-disease/guide/heart-disease-heart-attacks

Apr 17, 2017 ... What happens before, during and after a heart attack? WebMD explains the causes of heart attacks, which affect 1 million Americans every year ...

www.nhlbi.nih.gov/health/health-topics/topics/heartattack

A heart attack happens when the flow of oxygen-rich blood to a section of heart muscle suddenly becomes blocked and the heart can't get oxygen. If blood flow ...

www.mayoclinic.org/diseases-conditions/heart-attack/basics/definition/con-20019520

A heart attack occurs when the flow of blood to the heart is blocked, most often by a build-up of fat, cholesterol and other substances, which form a plaque in the ...

www.mayoclinic.org/diseases-conditions/heart-disease/symptoms-causes/syc-20353118

Oct 6, 2017 ... Learn about symptoms, causes and treatment of heart disease, a term describing a wide range of conditions that can affect the heart.

medlineplus.gov/heartattack.html

Over a million people in the U.S. have a heart attack each year. Learn the symptoms and get help quickly to prevent permanent heart damage and death.