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Acute myocardial infarction (AMI or MI), commonly known as a heart attack, is a serious, sudden heart condition usually characterized by varying degrees of chest pain or discomfort, weakness, sweating, nausea, vomiting, and arrhythmias, sometimes causing loss of consciousness. It occurs when the blood supply to a part of the heart is interrupted, causing death and scarring of the local heart tissue. Since the area affected may be large or small, the severity of heart attacks vary, but they are often a life-threatening medical emergency which demand both immediate attention and activation of the emergency medical services.

Diagnosis is by the combination of medical history, ECG findings and blood tests for cardiac enzymes. The most important treatment in myocardial infarction is restoring the blood flow to the heart, by thrombolysis (enzymatically dissolving the clot in the artery) and/or angioplasty (using a balloon to push the artery open). Close monitoring on a coronary care unit is mandatory to observe for various complications. There is emphasis on secondary prevention, the elimination of risk factors that could lead to further heart attacks.

The medical term myocardial infarction derives from myocardium (the heart muscle) and infarction (tissue death), in this case caused by an obstruction of blood flow. The phrase "heart attack" is occasionally used to refer to heart problems other than a myocardial infarction, such as unstable angina pectoris.

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Acute Myocardial Infarction GAP Project in Michigan - AMI GAP in Michigan is an effort to improve care for AMI with education and tool-based application of the ACC/AHA Acute Myocardial Infarction Guidelines in acute care hospitals.
Meta Description: [ AMI GAP in Michigan is an effort to improve care for AMI with education and tool-based application of the ACC/AHA Acute Myocardial Infarction Guidelines in acute care hospitals. ]

American Heart Association - 1998 U.S. heart attack and angina statistics.
Meta Description: [ This gives mortality, incidence and prevalence statistics on coronary heart disease and angina. It also has statistics for specific populations. ]

AskMen.com - Includes information of how to reduce the risk of heart attack.
Meta Description: [ Preventing a stroke- How to diagnose a stroke ]

Bob Findlay's Site - Relating to heart attack, heart bypass operations and heart disease. Cardiac support in the community.
Meta Description: [ For those with heart problems including heart attack, bypass surgery and angina. Coronary Care in the Community through the use of self-help groups. Freemasonry in the UK and historical links. Farquharson clan history. ]

Cardiology Channel - Information on heart attack diagnosis and treatments. Find a cardiologist in your area.
Meta Description: [ A heart attack is when plaque develops in its arteries and prevents an adequate supple of blood from flowing through the heart. Symptoms include a feeling of intense aching (which may radiate outwards) and feelings of tightness or pressure. Immediate medical attention is recommended. ]

eMedicine Health - Heart Attack - Consumer health resource center providing an overview of heart attacks and their causes, symptoms, and treatment.
Meta Description: [ If you are having pain or discomfort in your chest, jaw, shoulder, arm, or back and think you may be having a heart attack, call 911 immediately. Do not delay ... ]

404 George Washington University Hospital - Explains how important immediate treatment is in case of a heart attack. A list of common symptoms and important therapies are talked about which must be administered as soon as possible.
Meta Description: [ Signs and symptoms of a heart attack. Cardiac services at The George Washington University Hospital, Washington, D.C. ]

Heart Attack Decisionnaire - Complete a check list about heart attack risks.
Meta Description: [ Complete a check list about heart attack to discuss with your physician. ]

Heart Attack: Warning Signs and Tips on Prevention - From the AAFP.
Meta Description: [ -Information about heart attack warning signs and prevention from the American Academy of Family Physicians. ]

Heart Attack: Warning Signs and Tips on Prevention - Information from the AAFP.
Meta Description: [ -Information about heart attack warning signs and prevention from the American Academy of Family Physicians. ]

Heart Site.com - Explains what a heart attack is, the symptoms, what to do if one is suspected, hospital care, treatments and medication.
Meta Description: [ The diagnosis and treatment of a Heart Attack - Part 1 ]

HeartInfo.org: Heart Attack Symptoms and Warning Signs - Description of possible warning signals, plus information on silent ischemia.
Meta Description: [ Get detailed information on heart disease. Site offers latest news and expert advice on heart disease symptoms, treatment, and prevention – Learn what role cholesterol plays in heart disease? ]

HeartPoint - Myocardial infarction - Clear patient-oriented information on having a heart attack. Includes an animation of the pathological process and answers to a wide variety of common questions about this type of heart disease.

How Stuff Works - Carl Bianco M.D. provides a 6-part graphical in-depth look at heart disease, heart attacks and angina. Topics include atherosclerosis, hypertension, cholesterol, smoking, obesity, diabetes mellitus and stress.
Meta Description: [ Heart disease is the leading cause of death in the United States. Learn about heart disease, risk factors for heart disease, angina and heart attacks. ]

Management of Patients with Acute Myocardial Infarction - A report of the American College of Cardiology and American Heart Association Task Force on Practice Guidelines. Committee on Management of Acute Myocardial Infarction.

Mayo Clinic Health Information - A description and warning signs, followed by steps to be taken if a heart attack is suspected.

Mayo Clinic: Heart Attack - An overview of signs and symptoms, causes, risk factors, treatments and other important facts.
Meta Description: [ A heart attack is an injury to heart muscle caused by reduced blood supply. ]

MedicineNet.com - A look at heart attack (myocardial infarction) and the causes, symptoms, diagnosis, treatment options, recovery and prevention.
Meta Description: [ Overview on heart attack (myocardial infarction) and heart attack symptoms including signs of a heart attack, includes causes, risk factors, prevention, and treatment. Produced by medical doctors. ]

Methodist Health Care System - Explains what a heart attack is and talks about the inherited and acquired risk factors, management of risk factors, warning signs and treatment.
Meta Description: [ Methodist Hospital System ]

Miami Heart Research Institute - Detailed discussion on smoking, blood pressure, weight, exercise, diabetes, age and gender and family history. There is a calculator on site to calculate your own risk of having a heart attack.

The Los Angeles Fire Department - Signal and care for a person having a heart attack and the five steps of CPR.

404 University of Michigan Health System - Discussion about heart attacks, how they occur, symptoms, recovery, and risk factors.

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