Atrial Septal Defect with Communication Through the Coronary Sinus

Abstract

An unusual case is reported which illustrates a unique variation of the usually routine repair of atrial septal defects. Initial exploration of the right atrium failed to reveal a septal defect. Oxygenated blood appearing in the enlarged ostium of the coronary sinus suggested an anomaly with pulmonary venous blood entering that chamber. Identification of the communication was made by exploring the left atrium, and surgical repair could only be accomplished by the left atrial approach.