P-040 Major complications of dural venous sinus stenting for idiopathic intracranial hypertension: case series and management considerations

P-041 Figure 1 (A) Axial computed tomogram (CT) of the head showing bilateral chronic subdural hematomas (cSDHs). (B-D) Cerebral angiography images showing bilateral middle meningeal artery embolization with Onyx (views: B, un-subtracted posteroanterior; C, right lateral, D, left lateral). (E) Axial head CT at 30-day follow-up shows significant improvement of bilateral cSDHs. Used with permission from barrow neurological institute, Phoenix, Arizona Abstracts A48 J NeuroIntervent Surg 2021;13(Suppl 1):A1–A156 on A uust 3, 2021 by gest. P rocted by coright. http/jnis.bm jcom / J N eurotervent S urg: frst pulished as 10.1136intsurg-2021-S N IS 77 on 26 July 221. D ow nladed fom (20%) reported chronic headaches before embolization. With a mean follow-up of 489 (173) days, 8 of the 9 patients reported improvement of chronic headaches, with 7 having complete resolution. For these 9 patients, the mean HIT-6 score before was significantly higher than after embolization (64 [7.1] vs 40 [9.1], p<0.001). Conclusion In patients with chronic headache undergoing MMA embolization for a cSDH, the majority reported improvement of headaches after the procedure. Future prospective studies are warranted to assess the utility of MMA embolization for chronic headaches. Disclosures J. Catapano: None. K. Karahalios: None. V. Srinivasan: None. J. Baranoski: None. C. Rutledge: None. T. Cole: None. A. Ducruet: None. F. Albuquerque: None. A.