Thrombectomy Failure and Associated Factors for Large-Vessel Occlusion Stroke.

Background: Ischemic stroke due to Large Vessel Occlusion (LVO) represents a critical and time-sensitive neurological emergency. Advancements in imaging technology and endovascular therapies have transformed the management of LVO. Nonetheless, thrombectomy failure diminishes the chances of patients achieving a favorable clinical outcome.

Objective: We aimed to determine the factors influencing recanalization failure in order to optimize thrombectomy therapy along with enhancing patient outcomes.

Methods: A retrospective analysis was performed employing consecutive LVO patients who underwent Endovascular Thrombectomy (EVT) in a tertiary comprehensive stroke center between January 2020 and June 2024. Recanalization failure (mTICI 0-2a) following thrombectomy was assessed using the Kolmogorov-Smirnov test, χ² test, Fisher's exact test, and multivariable logistic regression to identify the related factors.

Results: A total of 82 EVT patients were analyzed. The mean age was 58.20 years and 70.73% of the patients were male. The rate of recanalization failure was 61%. Multivariable logistic regression analysis with age-sex adjusted factors has revealed hypertension [aOR: 5.31 (95% CI: 1.23-22.77); p =0.025] and no IVT [aOR: 2.75 (95% CI: 1.06-7.14); p =0.037] to be independent predictors of recanalization failure in this study.

Conclusion: Hypertension and the absence of prior intravenous thrombolysis have been found to be significant contributing factors to the high rate of thrombectomy failure in large-vessel occlusion.