Dr. John Barr is a pediatric neuroradiologist practicing at Children's Health. Dr. Barr is skilled in a wide variety of percutaneous neurovascular interventional procedures. He is one of the pioneers of treating ischemic stroke by placing catheters into the blood vessels of the brain to directly remove blood clots. Cerebral aneurysms, vascular malformations and arteriovenous fistulae may also be treated using similar techniques. Learn more.