brain arteriovenous malformation

A brain arteriovenous malformation (AVM) is an abnormal tangle of blood vessels where arteries directly connect to veins without the usual small vessels (capillaries) in between. This improper connection can cause increased blood flow and pressure in the surrounding vessels, which may lead to symptoms like headaches, seizures, or bleeding in the brain. AVMs are usually congenital, meaning present at birth, but they might not cause problems until later in life. Treatment options include options like surgery, embolization, or radiation therapy to reduce the risk of bleeding and other complications.