Coronary Sinus Orifice Atresia After the Fontan Completion: Unique Repair Technique.

We report a successful unroofing of the coronary sinus via a unique technique. Our patient was diagnosed with single ventricle morphology. Pulmonary artery banding and bidirectional cavopulmonary shunt were performed at 1 and 6 months old, respectively. Ordinary univentricular repair strategy was performed; extracardiac total cavopulmonary connection was achieved at 18 months old. Catheterization performed 1 year after the Fontan procedure revealed the coronary sinus orifice atresia, diffuse coronary artery stenosis, and sinusoid formation of the coronary system. We present a new technique using a small bronchial fiberscope to identify a coronary sinus buried in the atrial wall.