Surgical correction of a rare variant of cor triatriatum.

Cor triatratum is a rare congenital malformation. Problems in diagnosis and surgery arise due to associated anomalies such as atrial septal defects and anomalous pulmonary venous drainage. A 21-year-old man proved to have a rare variant of cor triatiatum in which both the upper and lower compartments of the left atrium communicated with the right atrium through two separate atrial septal defects. In addition, he had anomalous drainage of the right superior pulmonary vein into the superior vena cava. Intracardiac repair was undertaken successfully.