What happens during microsurgery for an AVM in the brain?

Dr. Geoffrey P. Colby, MD on behalf of UCLA Health

Neurosurgery

If possible, doctors use precise microsurgical techniques to treat an arteriovenous malformation (AVM) in the brain. They carefully separate the blood vessels of the AVM and block the feeding arteries one by one. The core of the AVM (nidus) is then removed, and the surrounding brain tissue is protected with minimal or no damage to the brain tissue. In removing the nidus, the AVM's draining vein is blocked off and cut. What's left is a small cavity in the brain where the AVM was located, and all the blood vessels coming in and going out of the AVM are thoroughly sealed so there can't be any post-operative bleeding. The blood vessels in the AVM are abnormal, unnecessary blood vessels and don't serve any purpose. They can be removed without disturbing the normal circulation of the brain.

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Heart and Circulatory System

Your circulatory system is made up of your heart and three main types of blood vessels -- arteries, veins and capillaries. Your heart is at the center of the system, acting as a pump to distribute nutrient- and oxygen-rich blood through your body; it then takes away carbon dioxide and other waste your body doesn't need. Signs of poor circulation include cold hands and feet, numbness, dizziness, migraines, varicose veins and pain in your feet or legs. Untreated, poor circulation can lead to stroke, high blood pressure, kidney damage and other diseases. Learn more about your heart and circulatory system with expert advice from Sharecare.

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