School of Medicine Publications and Presentations

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Objective: To evaluate functional and safety outcomes of Endovascular thrombectomy(EVT) vs Medical Management(MM) in patients with M2 occlusion and examine their association with perfusion imaging mismatch and stroke severity.

Methods: In a pooled, patient-level analysis of 3 randomized controlled trials(EXTEND-IA, EXTEND-IA-TNK part 1&2) and 2 prospective non-randomized studies(INSPIRE&SELECT), we evaluated EVT association with 90-day functional independence(mRS 0-2) in isolated M2 occlusions as compared to medical management overall and in subgroups by mismatch profile status and stroke severity.

Results: We included 517 patients(EVT=195, MM=322), baseline median(IQR) NIHSS was 13(8-19) in EVT vs 10(6-15) in MM, p

Interpretation: In patients with M2 occlusion, EVT was associated with improved clinical outcomes when compared to medical management. This association was primarily observed in patients with a mismatch profile and those with higher stroke severity. This article is protected by copyright. All rights reserved.


"This is the peer reviewed version of the following article:

Sarraj, A., Parsons, M., Bivard, A., Hassan, A. E., Abraham, M. G., Wu, T., Kleinig, T., Lin, L., Chen, C. A., Levi, C., Dong, Q., Cheng, X., Butcher, K. S., Choi, P., Yassi, N., Shah, D., Sharma, G., Pujara, D., Shaker, F., Blackburn, S., … SELECT Investigators, the EXTEND-IA Investigators, the EXTEND-IA TNK Investigators, the EXTEND-IA TNK Part II Investigators, and the INSPIRE Study Group (2022). Endovascular Thrombectomy versus Medical Management in Isolated M2 Occlusions: Pooled Patient-Level Analysis from the EXTEND-IA Trials, INSPIRE and SELECT Studies. Annals of neurology, 10.1002/ana.26331. Advance online publication.

which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited."

Publication Title

Annals of Neurology



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Mentor/PI Department


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Neurology Commons



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