A high-speed rotating atherectomy device for incising a stenosis of an artery having a predetermined diameter comprises a guidewire, a flexible, elongated rotatable member having a proximal end and a distal end and being advanceable along a guidewire A drive shaft, and a guide member fixedly attached to the drive shaft. When the guide member advances to the stenosis, when the drive shaft is rotated, the guide member creates a guide hole.所定の直径を有する動脈の狭窄を切開するための高速回転式のアテローム切除装置は、ガイドワイヤと、近位端および遠位端を有し柔軟で細長く回転可能でありガイドワイヤに沿って前進可能な駆動軸と、固定して駆動軸に取り付けられる誘導部材とを備える。誘導部材が狭窄に進んだ場合、駆動軸が回転されたとき、誘導部材は誘導孔を作る。
