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Principles of Dural Arteriovenous Fistula Surgery

Last Updated: September 28, 2018

Clip Ligation of a Petrosal/Tentorial Arteriovenous Fistula

Intracranial dural arteriovenous fistulas (dAVFs) are a group of acquired pathological vascular malformations that are defined by an abnormal connection between an artery and a vein, bypassing the capillary bed. The shunting that is confined to the dura is supplied by branches of the external carotid artery, tentorial branches of the internal carotid artery, meningeal branches of the vertebral artery, and rarely, the pial branches of the cerebral arteries.

The dAVFs and more specifically the fistulas themselves are located within the walls of the dural venous sinus. They may develop due to dural venous thrombosis, infection, previous surgery, or trauma, although many cases are idiopathic. Inflammatory changes from these condit...