A case report of communication of the coronary sinus with both atria associated with persistent left superior vena cava.

A 16-year-old Japanese girl with a persistent left superior vena cava draining into the coronary sinus was surgically treated. Both coronary sinus and left superior vena cava were totally unroofed in the posterior wall of the left atrium, but the routes were recognized as a deep ditch. Both preoperative diagnosis and the ensuing successful correction were performed only after the third cardiac catheterization and the third operation, respectively. The importance of preoperative diagnosis and the surgical procedures to correct this anomaly were discussed.