A balloon catheter for performing an angioplasty procedure on a lesion in a vessel comprising a flexible elongate catheter shaft having proximal and distal extremities. A balloon is secured to the distal extremity of the catheter shaft and has an outer surface extending between proximal and distal extremities...http://www.google.com/patents/US7186237?utm_source=gb-gplus-sharePatent US7186237 - Ballon catheter for creating a longitudinal channel in a lesion and method
