Surgical repair of unroofed coronary sinus with severe mitral regurgitation in an elderly patient

An unroofed coronary sinus (URCS) is a rare anomaly that produces communication between the left atrium (LA) and the coronary sinus (CS), resulting in a left-to-right shunt. Due to the lack of symptoms and particular anatomical characteristics, this disease is difficult to diagnose, and prone to be overlooked. An 85-year-old man was admitted to our hospital because of anorexia and shortness of breath. On physical examination, a systolic murmur...