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Patient selection flow chart of anterior circulation large vessel occlusion patients with unsuccessful thrombectomy. ICA, internal carotid artery; M1/M2, M1/M2 segment of the middle cerebral artery; LKN, last known normal; mRS, modified Rankin scale; mTICI, modified thrombolysis in cerebral infarction; ASPECTS, Alberta Stroke Program Early Computed Tomography Score, MT, mechanical thrombectomy; IVT, intravenous thrombolysis.
