Figure 9e. Recanalization of a grade 3 transverse-sigmoid sinus dural AVF after TVE. (a) Early arterial phase left common carotid angiogram shows a Grade 3 transverse-sigmoid sinus dural AVF. (b) Late arterial phase left common carotid angiogram shows that the left sigmoid sinus is occluded (arrow) and the dural AVF drains mainly into cortical veins and the posterior condylar vein (arrowheads). (c) Superselective venogram shows a microcatheter that has been advanced via the posterior condylar vein (arrowheads) into the affected sinus. (d) Left common carotid angiogram obtained after TVE shows disappearance of the AVF. (e) CT scan obtained 2 months after TVE shows a massive hemorrhage in the left temporal lobe. (f) Left common carotid angiogram shows recanalization of the dural AVF at the retrograde cortical drainage outlet (arrows).