Transcatheter occlusion of a large aortoazygos fistula using the Amplatzer device

This report describes the percutaneous embolization of an unusual aortoazygos arteriovenous fistula in a 22-month-old child. The large fistula (8 mm) was successfully occluded using a 12- to 10-mm Amplatzer Duct Occluder device using the arterial approach. The device was incompletely deployed into the abnormal vessel to avoid tearing of the intima by the sharp distal disk.