Table 1 Classifications of intracranial dural arteriovenous fistulas
Type | Description |
|---|---|
Type I | Drainage into a sinus without flow restriction |
Type II | Drainage into a sinus with flow restriction and reflux into other sinuses or into cortical veins |
Type III | Drainage into a cortical vein |
Type IV | Drainage into a cortical vein with a large varix |
Type V | Spinous perimedullary venous drainage |