Occlusion of the coronary sinus ostium: A danger for cavopulmonary anastomosis

Coronary sinus (CS) ostial obstruction decompressing through a left superior vena cava is a rare finding and presents unique risks to patients requiring a Glenn anastomosis for single‐ventricle palliation. Preoperative diagnosis is imperative in order to avoid inadvertent ligation or coil occlusion. We report three cases with single‐ventricle physiology and CS obstruction identified at cardiac catheterization. Balloon occlusion angiography proved valuable in making the diagnosis. Catheter Cardiovasc Interv 2005;64:108–111. © 2004 Wiley‐Liss, Inc.