RT Journal Article SR Electronic T1 Non-contrast head CT alone for thrombectomy in acute ischemic stroke: analysis of the ANGEL-ACT registry JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP 868 OP 874 DO 10.1136/neurintsurg-2021-017940 VO 14 IS 9 A1 Ren, Zeguang A1 Ma, Gaoting A1 Mokin, Maxim A1 Jadhav, Ashutosh P A1 Jia, Baixue A1 Tong, Xu A1 Bauer, Clayton A1 Liu, Raynald A1 Wang, Anxin A1 Zhang, Xuelei A1 Mo, Dapeng A1 Ma, Ning A1 Gao, Feng A1 Song, Ligang A1 Sun, Xuan A1 Huo, Xiaochuan A1 Deng, Yiming A1 Liu, Lian A1 Luo, Gang A1 Luo, Xiang A1 Peng, Ya A1 Gui, Liqiang A1 Song, Cunfeng A1 Wu, Jin A1 Wang, Leyuan A1 Li, Chunlei A1 Jovin, Tudor G A1 Wang, Yilong A1 Wang, Yongjun A1 Miao, Zhongrong A1 , YR 2022 UL http://jnis.bmj.com/content/14/9/868.abstract AB Backgroud The goal of this study was to determine if the choice of imaging paradigm performed in the emergency department influences the procedural or clinical outcomes after mechanical thrombectomy (MT).Methods This is a retrospective comparative outcome study which was conducted from the ANGEL-ACT registry. Comparisons were made between baseline characteristics and clinical outcomes of patients with acute ischemic stroke undergoing MT with non-contrast head computed tomography (NCHCT) alone versus patients undergoing NCHCT plus non-invasive vessel imaging (NVI) (including CT angiography (with or without CT perfusion) and magnetic resonance angiography). The primary outcome was the modified Rankin Scale (mRS) score at 90 days. Secondary outcomes included change in mRS score from baseline to 90 days, the proportions of mRS 0–1, 0–2, and 0–3, and dramatic clinical improvement at 24 hours. The safety outcomes were any intracranial hemorrhage (ICH), symptomatic ICH, and mortality within 90 days.Results A total of 894 patients met the inclusion criteria; 476 (53%) underwent NCHCT alone and 418 (47%) underwent NCHCT + NVI. In the NCHCT alone group, the door-to-reperfusion time was shorter by 47 min compared with the NCHCT + NVI group (219 vs 266 min, P<0.001). Patients in the NCHCT alone group showed a smaller increase in baseline mRS score at 90 days (median 3 vs 2 points; P=0.004) after adjustment. There were no significant differences between groups in the remaining clinical outcomes.Conclusions In patients selected for MT using NCHCT alone versus NCHCT + NVI, there were improved procedural outcomes and smaller increases in baseline mRS scores at 90 days.Data are available upon reasonable request. All data relevant to the study are included in the article or uploaded as supplementary information. All data relevant to the study are included in the article or uploaded as supplementary information. Data are available to researchers on request for purposes of reproducing the results or replicating the procedure by directly contacting the corresponding author.