A dural arteriovenous fistula (DAVF) or Malformation, is an abnormal direct connection (fistula) between a meningeal artery and a meningeal vein or dural venous sinus.
Signs and Symptoms
The most common signs/symptoms of DAVFs are:
Pulsatile tinnitus
Occipital bruit
Headache
Visual impairment
PapilledemaPulsatile tinnitus is the most common symptom in patients, and it is associated with transverse-sigmoid sinus DAVFs. [Source: Wikipedia 
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