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Abstract
Background
We aimed to assess the safety and efficacy of endovascular treatment (EVT) in patients with anterior circulation emergent large vessel occlusion (ELVO) beyond 6 h from symptom onset in a real-world cohort of patients in China.
Methods
We retrospectively examined 305 patients with anterior circulation ELVO treated with EVT. Patients were divided into two groups: treated with known onset within 6 h (n = 238) and beyond 6 h (n = 67). Multivariable logistic regression and ordinal shift analyses were used to evaluate the associations between onset-to-groin puncture time and safety and efficacy outcomes.
Results
Treatment beyond 6 h was not associated with symptomatic intracranial hemorrhage within 48 h (sICH; odds ratio [OR] 2.03, 95% confidence interval [CI] 0.48–8.57, p = 0.334), in-hospital mortality (OR 1.95, 95% CI 0.48–7.91, p = 0.348), successful recanalization (modified Thrombolysis in Cerebral Infarction score 2b or 3; OR 0.73, 95% CI 0.31–1.73, p = 0.470), favorable functional outcome (modified Rankin Scale score 0–2; OR 0.55, 95% CI 0.25–1.23, p = 0.145), and functional improvement (modified Rankin Scale shift by 1-point decrease; common OR 0.80, 95%CI 0.45–1.42, p = 0.450) at 3 months compared with treatment within 6 h. Futher interaction analysis showed that stroke etiology did not modify the associations between onset-to-groin puncture time and outcomes (p > 0.05).
Conclusions
In this real-world study, after careful assessment, EVT beyond 6 h from known stroke onset was safe, effective and had comparable short-term outcomes to EVT within 6 h.
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