Arteriovenous Malformation (AVM)

Overview

This is an abnormal connection between blood vessels. It happens when arteries connect directly to veins without first sending blood through tiny capillaries. An AVM can look like a tangle of blood vessels. They form anywhere in your body, but most often they form in or around the brain and along the spinal cord.

Causes

We don't understand what causes AVMs. Most people who have an AVM were born with it.

Symptoms

If you have one, you may not realize it. Many cause no problems. But sometimes an AVM causes noticeable symptoms. An AVM in your head can cause headaches, confusion and seizures. It can cause buzzing or whooshing noises in your ear. You may have dizziness or other vision problems. An AVM in your head or spine can cause weakness, numbness, balance issues and pain.

AVM Dangers

An AVM can keep your brain or your spinal cord from getting enough oxygenated blood. An AVM also may rupture and let blood leak out. That can cause you to have a stroke. Or, a large pool of blood may press harmfully against your brain or spinal cord. A bleeding AVM is a medical emergency.

Treatment

AVMs can be removed surgically. They can be treated with catheter and radiation techniques. Your healthcare provider will create a plan that is right for you.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.