Arteriovenous malformation information page.If left untreated, the bleeding can cause significant neurological damage and be fatal. The most common complications of an AVM are bleeding and seizures. These include hereditary hemorrhagic telangiectasia (HHT), also called Osler-Weber-Rendu syndrome. But most types of AVMs aren't inherited.Ĭertain hereditary conditions may increase your risk of AVM. Rarely, having a family history of AVMs can increase your risk. Certain genetic changes might play a role, but most types are not usually inherited. CausesĪVMs result from development of abnormal direct connections between arteries and veins, but experts don't understand why this happens. Many AVMs are currently discovered incidentally, often after a CT scan or an MRI is obtained for reasons not directly related to the AVM. Seek medical attention if you have any of the signs and symptoms of an AVM, such as headaches, dizziness, vision problems, seizures and changes in thinking or neurological function. A buildup of fluid in the brain (hydrocephalus) that causes enlargement of the head.A vein of Galen defect is located deep inside the brain.
One type of AVM called a vein of Galen defect causes symptoms that appear at or shortly after birth. Unusual sensations including numbness, tingling or sudden painĬhildren and teens may have trouble with learning or behavior.Problems with speech or understanding language.Vision problems, including losing part of your field of vision, loss of control of eye movements, or swelling of part of the optic nerve.Problems performing tasks that require planning.Loss of coordination that can cause problems with gait.Other possible signs and symptoms include: Progressive loss of neurological function.Besides bleeding, signs and symptoms can include: Often the first signs and symptoms appear after bleeding occurs. Symptoms of AVM vary based on where it's located.
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