Cardiac
myxomas are rare primary
cardiac tumors that usually present with
dyspnea or manifestations of systemic embolization. Coronary steal is a rare phenomenon of unbalanced blood flow that is seen primarily in patients who have undergone
coronary artery bypass grafting and have
subclavian artery stenosis. We report the case of a 72-year-old woman who presented with
fatigue, weakness, and exertional chest heaviness and had abnormal results on a cardiac stress test. The results of coronary angiography showed no obstructive
coronary artery disease but revealed a large intracardiac left atrial mass that was supplied by 2 anomalous coronary arteries. The patient underwent successful
ligation of the anomalous coronary arteries and resection of the mass, which was histologically an atrial
myxoma. The patient's symptoms resolved, and results of a repeat cardiac stress test were normal. To our knowledge, this is the first report of a highly vascularized atrial
myxoma that caused coronary steal with objective evidence of
ischemia, and with subsequent resolution after resection of the mass and
ligation of the anomalous coronary arteries.