A fast-flow anomaly composed of abnormal connections between arteries and veins. AVMs can expand and cause pain, skin breakdown, overgrowth of tissue, and rarely congestive heart failure. AVMs often require embolization (a procedure in which inert material is injected into the vessels to block them) or sclerotherapy (when the injection is directly into the AVM). Some AVMs can be surgically resected.
Learn more about Arteriovenous Malformation (AVM) in our Related Articles – Vascular Malformations.