IT WAS REPORTED THAT BALLOON RUPTURE OCCURRED. THE CHRONIC 50% STENOSED TARGET LESION WAS LOCATED IN THE NON-TORTUOUS BUT SEVERELY CALCIFIED SUBCLAVIAN ARTERY. A 6.0 X 60, 75CM MUSTANG BALLOON CATHETER WAS ADVANCED FOR DILATATION; HOWEVER, ON INITIAL INFLATION AT 22 ATMOSPHERES FOR 60 SECONDS, THE BALLOON RUPTURED. THE PROCEDURE WAS COMPLETED WITH ANOTHER 6.0 X 60, 75CM MUSTANG BALLOON CATHETER. THERE WERE NO PATIENT COMPLICATIONS NOR INJURIES REPORTED AND THE PATIENT WAS GOOD.