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A heart attack occurs when the flow of blood to the heart is severely reduced or blocked. The blockage is usually due to a buildup of fat, cholesterol and other substances in the heart (coronary) arteries. The fatty, cholesterol-containing deposits are called plaques. The process of plaque buildup is called atherosclerosis. Sometimes, a plaque can rupture and form a clot that blocks blood flow. A lack of blood flow can damage or destroy part of the heart muscle. A heart attack is also called a myocardial infarction. ...
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Symptoms of a heart attack vary. Some people have mild symptoms. Others have severe symptoms. Some people have no symptoms. Common heart attack symptoms include: Chest pain that may feel like pressure, tightness, pain, squeezing or aching Pain or discomfort that spreads to the shoulder, arm, back, neck, jaw, teeth or sometimes the upper belly Cold sweat Fatigue Heartburn or indigestion Lightheadedness or sudden dizziness Nausea Shortness of breath Women may...
Coronary artery disease causes most heart attacks. In coronary artery disease, one or more of the heart (coronary) arteries are blocked. This is usually due to cholesterol-containing deposits called plaques. Plaques can narrow the arteries, reducing blood flow to the heart.
If a plaque breaks open, it can cause a blood clot in the heart.
A heart attack may be caused by a complete or partial blockage of a heart (coronary) artery. One way to classify heart ...
Each minute after a heart attack, more heart tissue is damaged or dies. Urgent treatment is needed to fix blood flow and restore oxygen levels. Oxygen is given immediately. Specific heart attack treatment depends on whether there's a partial or complete blockage of blood flow. Medications Medications to treat a heart attack might include: Aspirin. Aspirin reduces blood clotting. It helps keep blood moving through a narrowed artery. If you called 911 or your local emergency number, you may be told to chew as...
It's never too late to take steps to prevent a heart attack — even if you've already had one. Here are ways to prevent a heart attack.
It's also a good idea to learn CPR properly so you can help someone who's having a heart attack. Consider taking an accredited first-aid training course, including CPR and how to use an automated external defibrillator (AED).
For informational purposes only and not a substitute for professional medical advice, diagnosis, or treatment.
© Mayo Clinic
Rheumatic heart disease |
Peripheral arterial disease |
Arrhythmias |
Atherosclerosis |