Pedunculated aortic mural thrombus attached at unusual site of normal aorta presenting with acute myocardial infarction.

Abstract

We report a rare case of thrombus formation in normal aorta causing myocardial

infarction. A 44-year-old man who had no prothrombotic risk factors presented

with acute myocardial infarction. Two-dimensional echocardiography revealed a

hypoechoic homogenous mass occupying the left coronary sinus and attached at the

nonatherosclerotic aorta. The mass seemed to cause myocardial infarction by

occluding the left anterior descending artery with oscillating movement according

to the cardiac cycles. After surgical resection, the histopathologic examination

revealed the mass as an organized thrombus. This case implies that an aortic

mural thrombus can form in a nonatherosclerotic aorta without any prothrombotic

risk factors.