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

Abstract

Objective To investigate risk factors for in⁃stent restenosis after proximal vertebral artery (VA) stenting. Methods One hundred and fifty⁃five patients underwent balloon⁃expandable stent assisted⁃angioplasty for symptomatic proximal VA stenosis from Januray 2007 to June 2017, and CTA or DSA were examined. The risk factors for in⁃sent 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 in⁃sent 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 stent diameter 2.5-3.5 mm (OR =5.126, 95%CI: 1.748-15.033; P=0.003) were risk factors for in⁃sent restenosis. Conclusions Coexist of basilar artery stenosis and smaller stent diameter were risk factors for in⁃stent restenosis after proximal VA stentintg. DOI：10.3969/j.issn.1672⁃6731.2020.06.010

Keywords

• vertebrobasilar insufficiency
• angioplasty
• stents
• risk factors
• logistic models