Cor triatriatum: preoperative diagnosis and successful surgical correction in a ten-week-old infant.

Cor triatriatum is a rare congenital cardiac anomaly which requires cardiac catheterization for diagnosis. The treatment is surgical resection of the fibromuscular diaphragm utilizing cardiopulmonary bypass. A ten-week-old infant with a preoperative diagnosis of cor triatriatum underwent successful operation. This represents the youngest patient to have undergone successful surgical correction of this lesion.