Surgical Repair of a Coronary Sinus Atrial Septal Defect in an Elderly Patient.

This report describes the case of a 75-year-old man with atrial fibrillation and mitral regurgitation who was diagnosed as having a coronary sinus atrial septal defect, also known as an unroofed coronary sinus, the rarest type of interatrial communication. Elderly patients with this anomaly are sometimes overlooked. However, with the advent of modern imaging techniques, an increasing number of patients with this condition are being diagnosed preoperatively. Our case of coronary sinus atrial septal defect with severe mitral and tricuspid regurgitation, which was treated successfully, is described here and accompanied by detailed surgical images.