RT Journal Article SR Electronic T1 P-015 Long-term results of angioplasty using stent-retrievers for cerebral vasospasm in subarachnoid hemorrhage patients JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP A29 OP A29 DO 10.1136/neurintsurg-2017-SNIS.52 VO 9 IS Suppl 1 A1 Kwon, H A1 Lee, Y A1 Koh, H YR 2017 UL http://jnis.bmj.com/content/9/Suppl_1/A29.1.abstract AB Introduction/Purpose To report our long-term results of mechanical angioplasty using stentrievers for recurred symptomatic cerebral vasospasm in subarachnoid hemorrhage patients.Materials and Methods We retrospectively reviewed medical records and radiological images of 7 patients who developed delayed vasospasm following subarachnoid hemorrhage and showed recurrence after initial angioplasty using intra-arterial vasodilator infusion from 2014 to 2017 at our institution. For those patients, we temporarily deployed a stentriever in the spastic branches for 3 min for mechanical vasodilation under general anesthesia and full heparinization. Three available stentrievers (Solitaire, Trevo, Revive) were used. We evaluated the clinical and radiological outcomes including recurrence rates and feasibility.Results A total of 39 stentriever-angioplasties were attempted for proximal or distal vessels. Deliveries and deployments of the stentrievers to the targeted spastic segments were feasible in all of the procedures before the intra-arterial infusion of vasodilator. Instant angiographical vasodilations were acquired in 33 (85%) vessels after retrieval of stentrievers. Follow-up images showed no significant recurrence of vasospasm in the vessels dilated by the stentrievers. Neurological improvements were noted in 6 (86%) patients after the procedures which include subsequent intra-arterial vasodilator infusion. One thrombotic occlusion of branch was recanalized with intra-arterial Tirofiban infusion. Temporary aggravation of vasospasm in the supraclinoid ICA which was thought to be caused by microcatheter irritation was relieved with the same procedure. One case of wire-induced distal vessel injury was trapped with detachable coils without further neurological detriment of the patient. No angiographical abnormality was found in the stentriever-deployed spastic vessels (12/39, 31%) at long-term follow-up angiograms (3 patients, mean 18.6 months).Conclusion Mechanical angioplasty using stent-retrievers for the delayed symptomatic vasospasm in the subarachnoid hemorrhage patients can be a feasible option especially for the recurred cases after chemical only angioplasty.Disclosures H. Kwon: None. Y. Lee: None. H. Koh: None.