Abstract:Objective To evaluate the ability of capillary index score (CIS) to evaluate collateral circulation in patients with acute anterior circulation ischemic stroke and the prognosis of endovascular treatment. Methods A retrospective analysis of 52 patients with acute anterior circulation ischemic stroke treated with endovascular treatment in the First People’s Hospital of Anqing City from February 2015 to December 2018. CIS performed with whole brain DSA before endovascular treatment showed 27 patients with good fCIS, 25 patients with poorCIS (pCIS). According to Modified Rankin Scale (mRS)), there were 24 and 28 cases in the good (< 2 points) and poor (> 3 points) prognosis group. Univariate analysis was used to compare the baseline data and clinical data of two groups. Multivariate logistic regression analysis was performed to analyze the effect of CIS on prognosis. Results There was no significant difference between fCIS group and pCIS group in age, gender, history of diabetes, systolic blood pressure, atrial fibrillation, hyperlipidemia, NIHSS score, onset time to TIR (all P > 0.05 ); the differences in DWI-ASPECTS score and mTICI ≥ IIb were statistically significant (all P < 0.05); there were no significant differences in age, gender, history of diabetes mellitus, systolic blood pressure, atrial fibrillation, hyperlipidemia, NIHSS score, onset to revascularization time (TIR) between the good prognosis group and the poor prognosis group(all P > 0.05 ); the differences in in DWI-ASPECTS score, mTICI ≥ IIb and fCIS were statistically significant (all P < 0.05). Multivariate logistic regression analysis showed that the scores of mTICI [Ol^R = 5.603, (95%CI: 2.035, 21.447)], DWI-ASPECTS [Ol^R = 0.625, (95%CI : 0.472, 0.826)] and CIS [Ol^R = 8.474, (95%CI: 2.478, 32.516)] were predictors of endovascular treatment outcome. Conclusion CIS can be used to evaluate brain perfusion and capillary filling, DWI-ASPECT score and CIS may be used to predict the prognosis of patients with acute ischemic stroke, while EVT is increasing.