Cor triatriatum with mitral regurgitation in a 52-year-old male.

The clinical, echocardiographic, and cineangiographic features of the oldest known living case of cor triatriatum are presented. Mitral regurgitation, also found in this patient, has been reported on only two previous occasions to coexist with other wise uncomplicated cor triatriatum. The value of two-dimensional echocardiography in the identification of this congenital anomaly is confirmed.