Stent fracture and restenosis after percutaneous transluminal angioplasty and stenting for symptomatic ostial vertebral/subclavian artery stenosis: a report of 3 cases and literature review

Objective To discuss mechanism and control measures of stent fracture and restenosis after percutaneous transluminal angioplasty and stenting (PTAS) for symptomatic ostial vertebral/subclavian artery stenosis. Methods A retrospective analysis was performed on 3 patients with stent fracture after receiving PTAS for symptomatic ostial vertebral/subclavian artery stenosis.Simple radiographic, ultrasonographic and clinical follow-up examinations were estimated. Related articles on coronary stent fracture were gone over, consulting in the types, cumulative incidence and occurrence time of adverse events, risk factors and preventive measures. Results Stent fractures of 3 patients with symptomatic ostial vertebral /subclavian artery stenosis were associated with in-stent restenosis and occlusion. Two of the 3 patients treated with the balloon angioplasty and after balloon dilatation, and the patients exhibited relief of symptoms. One patient was only managed for vascular disease risk factors, and no developing recurrent symptoms were noted during the follow-up period.Conclusions Stent fracture might appear in patients performed PTAS for symptomatic ostial vertebral /subclavian artery stenosis, and regular check is needed. Individual treatment was emphasized in case of serious symptoms appeared. Key words: Arterial stenosis;  Stent;  Stent fracture