Figure 4b. Cavernous sinus dural AVF with dominant cerebellar venous drainage. (a) Right external carotid arteriogram shows a cavernous sinus dural AVF draining into the superior ophthalmic vein and cerebellar veins via the superior petrosal sinus (arrow). (b) Right external carotid arteriogram obtained after TVE through an occluded inferior petrosal sinus shows obliteration of the dural AVF.