Coronary Sinus Ostial Atresia Presenting as Infective Endocarditis in a Previously Healthy Young Woman.

Coronary sinus ostial atresia is a rare disease. Most patients are usually asymptomatic and diagnosed incidentally during surgery or at autopsy. We report a case of coronary sinus ostial atresia with unroofed coronary sinus syndrome in a previously healthy woman who presented with infective endocarditis.