A balloon-supported embolism protection technique during vertebral/ subclavian artery angioplasty stenting

With high rates of morbidity and mortality,posterior circulation stroke accounts for 20% of ischemic strokes,and approximately 25% occurs in patients with stenosis in the vertebral and/or basilar arteries.liiOn the other hand,the risk of posterior circulation ischemic stroke reaches 30% in patients with symptomatic vertebral artery(VA)stenosis afterSyears,[2]subclavian artery(SA)occlusion,although with a low prevalence in the general population,is also an important causeof posterior circulation stroke.