Diagnosing and Treating an AVM

Many patients who are diagnosed with an arteriovenous malformation (AVM) only find out about their condition in the emergency room after a rupture. Others are diagnosed when the AVM is seen on a CT scan or MRI, which may have been performed after an accident or injury or may have been ordered by a neurologist to investigate the cause of a patient’s headaches or other symptoms.

Computerized tomography (CT) and magnetic resonance imaging (MRI) scans are noninvasive procedures that produce images of brain or spine structures and detect bleeding. CT scans use X-rays and MRI scans use magnetic fields to create images of the brain or spine. CT and MR scans detect the AVM but are not precise enough to see the details of an AVM’s structure and location, which are best seen on cerebral angiography (angiogram).

Cerebral angiography, also called cerebral arteriography, is a minimally invasive procedure that provides a detailed image of blood flow in the brain. An angiogram is the gold standard for diagnosing and evaluating AVMs. To perform an angiogram, a specialist called an interventional neuroradiologist inserts a catheter (a small plastic tube) into a blood vessel and feeds it gently toward the location of the suspected AVM. A special dye called a contrast agent is injected through the catheter and makes its way to the malformation. The path of the contrast agent, when viewed on an X-ray, produces an image of the AVM’s structure and allows the neuroradiologist and neurosurgeon to locate the AVM precisely within the brain or spinal column.

The recommended treatment plan will be based not only on the angiogram but also on the patient's clinical history, age, symptoms, and a physical examination.  For example, an older patient at low risk for bleed might be advised to have the AVM monitored rather than treated. Treatments include several surgical options (see Surgery for an AVM).

Use our online form to request an appointment with one of our cerebrovascular neurosurgeons, who have advanced expertise in treating AVMs and other vascular conditions of the brain and spine.

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What our Patients Say

Melissa* has an extraordinary resume — by day she’s a student working towards her doctorate in nutrition and by night she’s an aerial circus performer and instructor. She has danced her whole life and has developed a love for Latin dance, the circus...
Hannah Bonham was tired of being sick. For more than six months the young woman had been treated, retreated, and retreated again for an arteriovenous malformation (AVM), to no avail. In fact she’d gotten worse, as one procedure had resulted in a...

Our Care Team

  • Chair and Neurosurgeon-in-Chief
  • Margaret and Robert J. Hariri, MD ’87, PhD ’87 Professor of Neurological Surgery
Phone: 212-746-4684
  • Director of Cerebrovascular Surgery and Interventional Neuroradiology
  • Associate Professor of Neurological Surgery
  • Fellowship Director, Endovascular Neurosurgery
Phone: 212-746-5149
  • Director of Cerebrovascular and Endovascular Neurosurgery, NewYork-Presbyterian Brooklyn Methodist
Phone: 718-780-3070
  • Assistant Professor of Radiology in Neurological Surgery (Manhattan and Queens)
Phone: 212-746-2821 (Manhattan) or 718-303-3739 (Queens)
  • Professor of Radiology in Neurological Surgery
Phone: 212-746-4998
  • Victor and Tara Menezes Clinical Scholar in Neuroscience
  • Associate Professor of Neurological Surgery in Pediatrics
Phone: 212-746-2363
  • Associate Professor, Neurological Surgery
Phone: 718-670-1837
  • Director, Neurosurgical Radiosurgery
  • Professor of Clinical Neurological Surgery
Phone: 212-746-2438
  • Assistant Professor of Neurological Surgery (Brooklyn and Manhattan)
Phone: 212-746-2821 (Manhattan); 718-780-3070 (Brooklyn)

Reviewed by: Justin Schwarz, MD
Last reviewed/last updated: March 2024

Weill Cornell Medicine Neurological Surgery 525 East 68 Street, Box 99 New York, NY 10065 Phone: 866-426-7787