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Heart Attack

Also called: MI, Myocardial infarction

Summary

Each year almost 800,000 Americans have a heart attack. A heart attack happens when blood flow to the heart suddenly becomes blocked. Without the blood coming in, the heart can't get oxygen. If not treated quickly, the heart muscle begins to die. But if you do get quick treatment, you may be able prevent or limit damage to the heart muscle. That's why it's important to know the symptoms of a heart attack and call 9-1-1 if you or someone else is having them. You should call, even if you are not sure that it is a heart attack.

The most common symptoms in men and women are

  • Chest discomfort. It is often in center or left side of the chest. It usually lasts more than a few minutes. It may go away and come back. It can feel like pressure, squeezing, fullness, or pain. It also can feel like heartburn or indigestion.
  • Shortness of breath. Sometimes this is your only symptom. You may get it before or during the chest discomfort. It can happen when you are resting or doing a little bit of physical activity.
  • Discomfort in the upper body. You may feel pain or discomfort in one or both arms, the back, shoulders, neck, jaw, or upper part of the stomach.

You may also have other symptoms, such as nausea, vomiting, dizziness, and lightheadedness. You may break out in a cold sweat. Sometimes women will have different symptoms then men. For example, they are more likely to feel tired for no reason.

The most common cause of heart attacks is coronary artery disease (CAD). With CAD, there is a buildup of cholesterol and other material, called plaque, on their inner walls or the arteries. This is atherosclerosis. It can build up for years. Eventually an area of plaque can rupture (break open). A blood clot can form around the plaque and block the artery.

A less common cause of heart attack is a severe spasm (tightening) of a coronary artery. The spasm cuts off blood flow through the artery.

At the hospital, health care providers make a diagnosis based on your symptoms, blood tests, and different heart health tests. Treatments may include medicines and medical procedures such as coronary angioplasty. After a heart attack, cardiac rehabilitation and lifestyle changes can help you recover.

NIH: National Heart, Lung, and Blood Institute

Start Here

  • (American Heart Association)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute) - PDF Also in
  • (Mayo Foundation for Medical Education and Research)
  • (American Academy of Family Physicians) Also in
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute) Also in

Symptoms

  • From the National Institutes of Health (National Institutes of Health)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute) Also in

Diagnosis and Tests

  • (American Association for Clinical Chemistry)
  • (American Association for Clinical Chemistry)
  • Heart Health Tests: FreeFacebookCredits2012 Health Topic From the National Institutes of Health (National Library of Medicine) Also in Spanish
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute) Also in
  • (American Association for Clinical Chemistry)
  • (American Association for Clinical Chemistry)
  • (American Association for Clinical Chemistry)
  • (American Heart Association)

Prevention and Risk Factors

  • (Food and Drug Administration)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)
  • (Mayo Foundation for Medical Education and Research)
  • How to Prevent Heart Disease: FreeFacebookCredits2012 Health Topic From the National Institutes of Health (National Library of Medicine) Also in Spanish
  • (American Heart Association)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute) Also in
  • Easy-to-Read (Office of Disease Prevention and Health Promotion) Also in
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute) Also in

Treatments and Therapies

Living With

Related Issues

  • (American Heart Association)
  • (American Heart Association)
  • (Mayo Foundation for Medical Education and Research) Also in
  • (Mayo Foundation for Medical Education and Research)
  • (American Heart Association)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Specifics

  • (American Heart Association)
  • (American Heart Association)
  • (Mayo Foundation for Medical Education and Research)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Health Check Tools

  • (American Heart Association)

Statistics and Research

  • (American Heart Association)

Clinical Trials

  • From the National Institutes of Health (National Institutes of Health)

Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

Reference Desk

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  • (Texas Heart Institute) Also in
  • (American Heart Association)
  • From the National Institutes of Health (National Heart, Lung, and Blood Institute)

Find an Expert

  • (American Heart Association)
  • From the National Institutes of Health

Women

  • (Mayo Foundation for Medical Education and Research)
  • (Department of Health and Human Services, Office on Women's Health)
  • (American Heart Association)
  • (Department of Health and Human Services, Office on Women's Health) Also in
  • (Women's Heart Foundation) Also in

Seniors

  • (American Geriatrics Society)

Patient Handouts

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