The present invention provides a handheld device and method for treating an artery having atherosclerosis. The handheld device for treating an artery comprises a handle for holding the device, an effector adapted to the handle for carrying out the treatment on the arteries, said effector having an ablating means, and a feedback controller for controlling process of treatment. Advantageously, the device allows for treating the artery without invasion of the blood vessel lumen, without damaging the tunica intima of the artery, and more importantly, the device can be used for treating early and mid-stage plaque formation in the arterial wall, which goes undetected in routine angiography.本發明提供一種用於治療具有動脈粥樣硬化之一動脈的手持式裝置及方法。用於治療一動脈之該手持式裝置包含：一手柄，其用於固持該裝置；一執行器，其適配於該手柄以用於對該等動脈進行治療，該執行器具有一切除構件；以及一回饋控制器，其用於控制治療程序。有利地，該裝置允許在不侵入血管內腔、不損害該動脈之內膜的情況下治療該動脈，且更重要地，該裝置可用於治療動脈壁中之在常規血管造影中未偵測到的早期及中期斑塊形成。
