[A case report of unroofed coronary sinus with repeated congestive cardiac failure].

We reported a 64-year-old woman with frequent cardiac failure due to unroofed coronary sinus complicated with tricuspid regurgitation (TR). We performed direct suture closure of unroofed coronary sinus and tricuspid annuloplasty with a Carpentier ring (34 T). Immediately after the operation, large amount of pleural effusion accumulated owing to acute left ventricular failure. That cause consists in the scarcity of the left ventricular volume, which was depending on the much left-to-right shunt volume through the unroofed coronary sinus. But her general condition was recovered from acute left ventricular failure for administration of catecholamine, digitalization, and urinative. We think that the echocardiography is valuable to investigation of the existence of unroofed coronary sinus, especially complicated with TR.