Abstract
The histological picture of sites of coronary spasms has not yet been made sufficiently clear. A histopathological examination was performed on the coronary artery of a patient who died of acute myocardial infarction after a refractory coronary spasm was identified by coronary arteriography. In the site of the coronary spasm, intimal bleeding as well as infiltration by lymphocytes and plasma cells in the adventitia were seen. In the same region, fracture of intimal collagen fibers and rupture of atheromatous plaque were observed. Although it is very difficult to prove in individual cases of acute myocardial infarction that spasms played a part, some cases involving spasms may possibly exist among the cases of acute myocardial infarction showing atheromatous plaque rupture--thrombus formation.
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