IT WAS REPORTED THAT BALLOON RUPTURE OCCURRED. THE 90% STENOSED TARGET LESION WAS LOCATED IN THE MODERATELY TORTUOUS AND MILDLY CALCIFIED SHUNT VESSEL. A 6.0MMX40MMX40CM (4F) STERLING BALLOON CATHETER WAS ADVANCED FOR DILATATION. HOWEVER, DURING THE FIRST INFLATION AT 6 ATMOSPHERES FOR 30 SECONDS, THE BALLOON RUPTURED. THE PROCEDURE WAS COMPLETED WITH ANOTHER OF THE SAME DEVICE. NO PATIENT COMPLICATIONS REPORTED.