This group has pioneered many of the breakthough treatments for Intracranial Arterial Aneurysms, Arteriovenous Malformations (AVM's), Traumatic Vascular Injuries, Cerebral Angioplasty for Atherosclerosis and Vasospasm, Thrombolytic Therapy for Acute Stroke, Pre-operative occlusion of Vascular Tumors of the Head, Neck and Spinal Cord.