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heart attack |
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heart attack: see under infarction myocardial infarction or heart attack is usually caused by a blockage in one of the coronary arteries that supply blood to the heart muscle. The blockage typically occurs when a blood clot (see thrombosis ) lodges in an area already narrowed by arteriosclerosis ; other ..... Click the link for more information. . heart attackor myocardial infarctionDeath of a section of heart muscle when its blood supply is cut off, usually by a blood clot in a coronary artery narrowed by atherosclerosis. Hypertension, diabetes mellitus, high cholesterol, cigarette smoking, and coronary heart disease increase the risk. Symptoms include severe chest pain, often radiating to the left arm, and shortness of breath. Up to 20% of victims die before reaching the hospital. Diagnosis is done by electrocardiography and by analysis for enzymes in the blood. Treatment aims to limit the area of tissue death (infarct) and prevent and treat complications. Thrombolytic (clot-dissolving) drugs may be administered. Beta-blockers alleviate pain and slow the heart rate. Angioplasty or coronary bypass restores blood flow to heart muscle. Follow-up may include drugs, exercise programs, and counseling on diet and lifestyle changes. |
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But by communicating with ambulance paramedics, who relay electrocardiogram readings, doctors determine whether a patient is suffering a STEMI heart attack and needs to go directly to Holy Cross -- saving valuable time. The procedure, angioplasty, has been found to offer benefits when it's done within 48 hours of a heart attack (SN: 6/25/05, p. With these data we believe we can design a highly sensitive information-rich Phase III trial for the prevention of heart attack that will require only a fraction of the number of participants that would be needed for a traditional trial. |
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heart attack
