Following diagnosis of severe carotid artery disease, numerous studies have shown that carotid endarterectomy is the best treatment method available for restoring the artery, and thereby preventing stroke. Since the plaque is typically limited to a very small area in the mid-portion of the artery in the neck, removal by carotid endarterectomy can be performed through a small incision and frequently under local anesthesia. Recovery from carotid endarterectomy surgery and resumption of day-to-day activities is usually fairly quick, and 90 percent of patients have normal carotid arteries for the rest of their lives. Follow-up ultrasound scans are performed at regular intervals.