Transcatheter occlusion of an intrahepatic venovenous fistula after modified Fontan circulation by implantation of an Amplatzer atrial septal occluder.

We report two successful transcatheter closures of intrahepatic venovenous malformations observed after bidirectional cavopulmonary anastomoses. These malformations were detected immediately after surgery in one case and during a 10-year follow-up in the second case. These intrahepatic venovenous malformations were successfully occluded by the implantation of an Amplatzer atrial septal occluder. (C) 2004 Wiley-Liss, Inc.