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Endovascular treatment versus medical management for mild stroke with acute anterior circulation large vessel occlusion: a meta-analysis

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Background The effectiveness of endovascular treatment (EVT) in patients with mild stroke (National Institutes of Health Stroke Scale score ≤5) and acute anterior circulation large vessel occlusion (AACLVO) remains unknown.… Click to show full abstract

Background The effectiveness of endovascular treatment (EVT) in patients with mild stroke (National Institutes of Health Stroke Scale score ≤5) and acute anterior circulation large vessel occlusion (AACLVO) remains unknown. Objective To conduct a meta-analysis to compare the efficacy and safety of EVT in patients with mild stroke and AACLVO. Methods EMBASE, Cochrane Library, PubMed, and Clinicaltrials.gov databases were searched until October 2022. Both retrospective and prospective studies which compared the clinical outcomes between EVT and medical treatment were included. ORs and 95% confidence intervals (CIs) for excellent and favorable functional outcomes, symptomatic intracranial hemorrhage (ICH), and mortality were pooled using a random-effects model. A propensity score (PS)-based methods adjusted analysis was also performed. Results 4335 patients from 14 studies were included. In patients with mild stroke and AACLVO, EVT presented no marked differences in excellent and favorable functional outcomes and mortality compared with medical treatment. A higher risk of symptomatic ICH (OR=2.79; 95% CI 1.49 to 5.24; P=0.001) was observed with EVT. Subgroup analysis revealed that EVT had potential benefit for proximal occlusions with excellent functional outcomes (OR=1.68; 95% CI 1.01 to 2.82; P=0.05). Similar results were observed when PS-based methods adjusted analysis was used. Conclusion EVT did not significantly benefit clinical functional outcomes in comparison with medical treatment in patients with mild stroke and AACLVO. However, it may improve functional outcomes when treating patients with proximal occlusion, despite being associated with an increased risk of symptomatic ICH. Stronger evidence from ongoing randomized controlled trials is required.

Keywords: occlusion; mild stroke; functional outcomes; endovascular treatment; analysis; treatment

Journal Title: Journal of NeuroInterventional Surgery
Year Published: 2023

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