Analysis of risk factors for in-stent restenosis after proximal vertebral artery stent implantation.

Objective To investigate predictive risk factors of in-stent restenosis after proximal vertebral artery (VA) stenting. Methods One hundred and fifteen patients-received balloon - expandable stent assisted - angioplasty for symptomatic proximal VA stenosis between January 2007 and June 2017, and underwent CTA or DSA follow-up were included. The predictive risk factors of restenosis after proximal VA stenting were investigated via univariate and multivariate forward Logistic regression analysis. Results One hundred and fifty - five patients were treated with 178 balloon - expandable stents, the restenosis rate was 30.90% (55/178). Univariate and multivariate forward Logistic regression analysis found that coexist of basilar artery stenosis (OR = 4.468, 95% CI: 1.685-11.849; P = 0.003) and smaller stent diameter (OR = 5.126, 95% CI: 1.748-15.033; P = 0.003) were risk factors of restenosis. Conclusions Coexist of basilar artery stenosis and smaller stent diameter were risk factors of in - stent restenosis after proximal VA stentintg. [ABSTRACT FROM AUTHOR]