Pathophysiology: Dural arteriovenous fistulae (DAVF) are rare, abnormal connections between arteries and veins in a protective membrane on the outer layer of the brain and spine, called the dura. These abnormal blood vessels divert blood from the normal paths. If the volume of diverted blood flow is large, tissue downstream may not receive an adequate blood and oxygen supply. This condition can be caused by head trauma, infection, surgery or blood clots in the brain, called thrombosis, or may be a congenital or birth defect. Symptoms: Headaches, Ringing in Ears, Stroke-like Symptoms and Visual Problems.
Treatment: Endovascular techniques, which are minimally invasive procedures that are performed through the blood vessels, have been developed to safely treat DAVFs. An approach, called embolization, reduces blood flow to the DAVF by obstructing surrounding blood vessels or Doctors use stereotactic radiosurgery or the Gamma Knife. Major Research: CT Angiography as a Screening Tool for Dural Arteriovenous Fistula in Patients with Pulsatile Tinnitus: Feasibility and Test Characteristics.