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Delayed neurological improvement after endovascular treatment for acute large vessel occlusion: data from ANGEL-ACT registry

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Abstract

Background

A subgroup of patients with acute large vessel occlusion (ALVO) may experience delayed neurological improvement (DNI) after endovascular treatment (EVT). Our study aimed to investigate the incidence and independent predictors of DNI in patients with ALVO after EVT.

Methods

We selected subjects from ANGEL-ACT Registry. The definition of DNI is patients with ALVO who did not experience early neurological improvement (ENI) despite complete recanalization after EVT. These patients achieved a 90-day favorable outcome assessed by a modified Rankin Scale (mRS) score. We defined ENI as a ≥ 4-point decrease in the National Institutes of Health Stroke Scale (NIHSS) between baseline and 24 h or NIHSS of 0 or 1 at 24 h, with complete recanalization after EVT. We performed logistic regression analyses to determine the independent predictors of DNI.

Results

Among the 1056 enrolled patients, 406 (38.4%) did not experience ENI. 106 (26.1%) patients without ENI achieved DNI. On Multivariate analysis, lower admission NIHSS score (odds ratio [OR] = 1.17,95% confidence interval [CI]: 1.11–1.23, P < 0.001), underlying ICAD (OR = 2.03, 95% CI: 1.07–3.85, P = 0.029) and absence of general anesthesia (OR = 2.13, 95% CI: 1.24–3.64, P = 0.006) were independent predictors of DNI.

Conclusion

DNI occurred in 26.1% of patients with ALVO who did not experience ENI after EVT. Our study identified several independent predictors of DNI that should be highly considered in daily clinical practice to improve ALVO management.

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Data availability

The data of this study are available from the corresponding author upon reasonable request.

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Funding

This Study funded by the National Key Research and Development Program of China, grant number 2016YFC1301500and China Postdoctoral Science Foundation, grant number 2020-YJ-008.

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Correspondence to Zhongrong Miao.

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Conflict of interest

The authors declare that they have no conflicts of interest.

Ethics approval

This study was approved by the ethics committees of Beijing Tiantan Hospital, Capital Medical University. The ID of the approval: KY2017-048-01. Subjects or their legally authorized representatives provided written informed consent prior to commencing the study.

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Dapeng Sun and Raynald contributed equally to this work.

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Sun, D., -, R., Huo, X. et al. Delayed neurological improvement after endovascular treatment for acute large vessel occlusion: data from ANGEL-ACT registry. J Thromb Thrombolysis 55, 1–8 (2023). https://doi.org/10.1007/s11239-022-02712-7

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