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In cases of a heart attack or myocardial infarction this occurs because of an occlusion or blockage of a coronary artery feeding the ventricles or main pumping chambers of the heart In this example a fatty deposit or plaque has reduced the diameter that blood can flow through This occurs in a condition called atherosclerosis the thickening and hardening of
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If a blood clot totally blocks the blood supply to the heart muscle called a coronary thrombus or coronary occlusion the heart muscle becomes starved for
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After the acute phase of a heart attack An acute myocardial infarction is caused by a sudden occlusion of a diseased coronary artery That occlusion causes some or all of the heart muscle
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Such an event might also be called a coronary thrombosis or coronary occlusion The subsequent lack of oxygen can result in disability or death of the affected part of the heart muscle Sometimes a heart attack is caused by severe spasm of a coronary artery rather than a blockage The exact causes of spasm in coronary arteries are unclear spasm can occur apparently normal
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muscle tissue most commonly from coronary occlusion Often referred to as a heart attack myocardial infarction occurs suddenly but is usually the result of long term conditions Typically the coronary arteries are thickened with cholesterol plaques over the course of many years increasingly narrowing the lumenal space The rupture of a plaque can result in the
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Source The Ciba Collection of medical Illustrations Vol 5 HEART Frank H Netter M D Degrees of Coronary Atherosclerotic Narrowing or Occlusion Stages and Diagnosis of Coronary Artery Atherosclerosis Atherosclerotic coronary artery disease can be detected in two general stages These are the hidden or occult stage and the
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Coronary Angiography Coronary angiography is performed to detect obstruction in the coronary arteries which can lead to heart attack or myocardial infarction Coronary Angiogram showing Total Occlusion of LCX Artery BEFORE TREATMENT
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which ruptures causing a blood clot to form and block the artery A similar rupture and blockage in an artery leading to the brain may cause a stroke or brain attack Diagnosis Heart attacks may be sudden and intense or start slowly with mild pain or discomfort Dial 911 if you experience any or all of the following symptoms
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Caused by an occlusion blockage in an artery that supplies blood to the heart coronary artery The affected heart muscle then begins to die due to lack of oxygen
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the more distal or more movable attachment is the insertion the narrowing part of the belly that is attached to the tendon of origin is called the caput or head Syn musculus TA myocardial infarction MI infarction of an segment of the heart muscle usually as a result of occlusion of a coronary artery Syn heart attack cardiac infarction Myocardial
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