Rotoblator therapy (also called coronary atherectomy) removes plaque from the arteries supplying blood to the heart muscle. It uses a laser catheter, or a rotating shaver ("burr" device on the end of a catheter). The catheter is inserted into the body and advanced through an artery to the area of narrowing. Other devices are dissectional catheterectomy, catheters that shave off the plaque, or laser catheters that vaporize the plaque. Balloon angioplasty or stenting may be used after an atherectomy.