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A heart attack, or myocardial infarction, occurs when one or more regions of the heart muscle experience a severe or prolonged lack of oxygen caused by blocked blood flow to the heart muscle.
The blockage is often a result of atherosclerosis – a buildup of plaque composed of fat deposits, cholesterol, and other substances. Plaque ruptures and eventually a blood clot forms. The actual cause of a heart attack is a blood clot that forms within the plaque-obstructed area.
If the blood and oxygen supply is cut off severely or for a long period of time, muscle cells of the heart suffer damage and die. The result is dysfunction of the muscle of the heart in the area affected by the lack of oxygen.
Heart attack is a serious medical condition that can be fatal if not treated in time. It is important to recognize the symptoms of a heart attack and seek immediate medical attention. Knowing the signs of a heart attack can help save lives. Common symptoms of a heart attack include chest pain, shortness of breath, dizziness, nausea, sweating, and pain in other parts of the body such as the arms, back or jaw. Other signs may include fatigue, palpitations and anxiety. It is important to pay attention to these symptoms and seek medical help immediately if you experience any of them.
A heart attack is a medical emergency caused by a sudden blockage in the arteries that supply blood to the heart. It can be caused by a variety of factors, including high cholesterol, high blood pressure, smoking, diabetes, obesity and family history.
The most common cause of a heart attack is atherosclerosis, which is the buildup of fatty deposits on the walls of your arteries. This can lead to plaque formation and narrowing of your arteries, reducing or blocking blood flow to your heart. Other causes include coronary artery spasm and coronary artery dissection.
There are two types of risk factors for heart attack, including the following:
Inherited (or genetic) | Acquired |
Inherited or genetic risk factors are risk factors you are born with that cannot be changed, but can be improved with medical management and lifestyle changes. | Acquired risk factors are caused by activities that we choose to include in our lives that can be managed through lifestyle changes and clinical care. |
The goal of treatment for a heart attack is to relieve pain, preserve the heart muscle function, and prevent death.