[Retrospective analysis of endovascular thrombectomy in anterior cerebral circulation out of 6-hours «therapeutic window» in regional vascular centers of Saint-Petersburg].

Objective: Based on a retrospective analysis, to evaluate technical results and functional outcomes at discharge after endovascular thrombectomy (EVT) in anterior circulation out of 6-hours «therapeutic window» in patients with stroke.

Material And Methods: The retrospective analysis of EVT in 594 acute stroke patients (303 male, 291 female, median age 69 years) with the anterior circulation large vessel occlusion was performed. EVT was carried out before 6 hrs in 550, later in 44 patients. Time to artery puncture was defined as a cut point. Patients were included in the study if they met the criterion for 0-6 hours «therapeutic window».

Results: No significant differences in functional outcomes at discharge assessed with the Rankin scale (mRs 0-2 29.8% and 20.5% <0.19; mRs 3-5 38.7% and 38.6% <0.99; mRs 6 31.5% and 40.9% <0.2) and the rates of intracranial haemorrhage, haemorrhagic transformation and symptomatic haemorrhagic transformation (4% and 0% <0.17; 20.9% and 29.5% <0.49; 10.1% and 11.4% <0.78) were observed in patients exposed to EVT before 6 hrs and later.

Conclusion: EVT in anterior circulation stroke over 6 hrs «therapeutic window» based on the criterion for 0-6 hrs provides comparable functional outcomes at discharge without the increase in the frequency of intracranial haemorrhages, haemorrhagic and symptomatic haemorrhagic transformations.