The strange case of congenital mitral stenosis in an adult man with cor triatriatum.

We report the case of a 74-year-old male, with a medical history of cor triatriatum, admitted with a 10-day history of intermittent fever. Three sets of blood cultures were positive for Providencia rettgeri. Transthoracic and transesophageal echocardiogram excluded infective endocarditis, but revealed a congenital accessory tissue adhering to the mitral valve, causing supravalvular mitral stenosis. Cor triatriatum sinistrum is a rare congenital cardiac anomaly, even more uncommon in adults, and quite exceptional when associated with mitral valve disease. Because the patient had no symptoms related to the heart valve disease, no surgical indication was given and he was managed conservatively.