   E Grade A0:                                           ≥00% of successful nidus embolization for compact (plexiform) type AVM   ----------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------------   E Grade A0:                                           ≥00% of successful nidus embolization and proximal occlusion of fistulous feeders for mixed (plexiform + fistulous) type AVM   E Grade B0:                                           \<00% of successful nidus embolization for compact (plexiform) type AVM   E Grade B0:                                           \<00% of successful nidus embolization and proximal occlusion of fistulous feeders for mixed (plexiform + fistulous) type 