Stroke Research & Therapy

Arteriovenous Malformations (AVMs) are defects of the circulatory system comprised of snarled tangles of arteries and veins. AVM is an abnormal connection between arteries and veins, bypassing the capillary system, and directly diverts blood from the arteries to the veins. AVM most often occurs in the brain or spine. If AVM occurs in the brain, vessels can break and bleed into the brain.