We present a case of left atrial sarcoma presenting as acute myocardial infarction. Echocardiographic finding of left atrial mass, absence of angiographic evidence of coronary atherosclerotic disease, and incidental finding of prior splenic infarct strongly point to coronary emboli. The relatively low incidence of cardiac sarcoma and the uncommon presentation of cardiac sarcoma as myocardial infarction make this case unique.