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What Is a Heart Attack?
A heart attack occurs when the supply of blood and oxygen to an area of heart muscle is blocked, usually by a clot in a coronary artery.

Association for Eradication of Heart Attacks
A heart attack vaccination will prevent heart attacks in vulnerable patients. Heart attack education includes heart attack warning signs.

Act in Time 2006
Act in Time to Heart Attack Signs is a national public education campaign that provides materials to educate Americans about the warning signs of a heart attack.
Heart Attack Warning Signs
A heart attack is a frightening event, and you probably don't want to think about it. But, if you learn the signs of a heart attack and what steps to take, you can save a life–maybe your own. http://www.nhlbi.nih.gov
Heart Attack Causes
Factors that can be controlled and risk factors that cannot be controlled.
Heart Attack Diagnosis
A heart attack, clinically known as a myocardial infarction, occurs when an artery supplying the heart with blood carrying oxygen and nutrients suddenly becomes blocked, causing part of the heart muscle to die.
Act In Time to Heart Attack Signs
The National Heart, Lung, and Blood Institute (NHLBI), part of the National Institutes of Health, designed this Web page as part of a campaign to increase awareness of the need to act fast when someone may be having a heart attack.
MedlinePlus Heart Attack
Each year over a million people in the U.S. have a heart attack. Read more about heart attack in this article from Medline Plus.
Heart Attack, Stroke and Cardiac Arrest Warning Signs
Know the warning signs of heart attack, stroke and cardiac arrest, and what to do if they appear. You could save someone's life.
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