an abnormal, congenital tangle of arteries and veins that are directly connected and lack any intervening capillaries. Such malformations may have no apparent symptoms, but in the brain they can hemorrhage abruptly, causing mild to severe brain damage. Symptoms may range from headaches to paralysis and aphasia, depending on the specific location.

ARTERIOVENOUS MALFORMATION (AVM): "Arteriovenous malformation refers to a congenital tangle of arteries in the brain that may hemorrhage, leading to brain damage."
Cite this page: N., Pam M.S., "ARTERIOVENOUS MALFORMATION (AVM)," in, April 7, 2013, (accessed May 8, 2021).