The Prevalence and Significance of Thrombi in Coronary Arteries in Fatal Acute Myocardial Infarction.

Abstract
Acute myocardial infarction is generally believed to be the result of thrombotic occlusion of a major coronary artery. To determine the prevalence of thrombi, the three major coronary arteries were sectioned histologically in their entirety in 42 patients who died of acute myocardial infarction. Thrombi were found in 15 of the 42 patients. In 8 of the 15, associated hemorrhages into plaques also were present. Three others had hemorrhages into plaques without associated thrombi. In 24 no thrombi or hemorrhages were observed in the coronary arteries. The lumens of the arteries in 41 of the 42 patients were narrowed greater

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