Abstract: A method for surgically enlarging an arterial lumen totally occluded by a stenotic lesion, and a unique balloon catheter used during that operation. The balloon catheter is generally rod shaped and includes an elongated tubular member having a double central lumen with a proximal end and a distal end and a balloon portion having a concave distal tip smaller in diameter than the proximal tip. The method takes advantage of the catheter design and includes positioning of the catheter in close proximity to a total occlusion and inflating the balloon to form a plaque cleft.

Abstract: A catheter is provided comprising a first portion of substantially linear shape, a second portion extending from the first portion at an angle in a curved manner, and a third portion. The third portion extends from the second portion in an out of plane manner relative to the first and second portions. The catheter is thus constructed to provide hooked engagement of an internal thoracic artery.