brain arteriovenous malformation (AVM) is an abnormal mesh of blood vessels that set up the connection of the arteries and veins present in the brain. The arteries carry blood rich in oxygen from the heart to the brain. Veins, on the other hand, carry oxygen-deficient blood back into the heart and lungs. A top neurologist in India states that with a brain AVM setting in this vital process is put into complete jeopardy.