A 68-year-old woman had clinical signs of an acute myocardial infarction. Echocardiography revealed a tumor in the left atrium. Coronary angiography demonstrated total occlusion at RCA#1. On emergency operation a left atrial myxoma was removed and aortocoronary saphenous vein graft to the right coronary artery was performed. The operative correction of coronary arterial obstruction due to cardiac myxoma or thrombus is rare.