Arteriovenous Malformation


What is an arteriovenous malformation? An arteriovenous malformation (AVM) is an abnormal connection between arteries and veins. Blood flows too quickly from the arteries and pushes on the walls of the veins. This can damage or weaken the veins and cause them to bulge and get twisted. An AVM that has not burst usually causes no symptoms. If it bursts, blood will leak into surrounding tissue, and may cause a stroke.

How is an AVM diagnosed? An AVM that has not burst may be found only when your healthcare providers are doing tests for other conditions. Your healthcare provider will ask about your medical conditions and examine you. You may also need any of the following tests. You may be given contrast dye to help arteries and veins show up better in the pictures. Tell the healthcare provider if you have ever had an allergic reaction to contrast dye.

How is an AVM treated?

When should I contact my healthcare provider?

When should I seek immediate care or call 911?


You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your caregivers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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