Clinical study on in-stent restenosis after middle cerebral artery wingspan stenting

Abstract

Objective To observe long-term follow-up results of in-stent restenosis by digital subtraction angiography(DSA) method after angioplasty and stenting with the Gateway-Wingspan stenting system in middle cerebral artery(MCA).Methods Consecutive patients with ischemic stroke and Wingspan stent placement were enrolled into our study.The proportion of in-stent restenosis and ischemic stroke associated with restenosis were evaluated by DSA after 6 and 12 months of stent placement.Results 30 patients with stenosis/occlusion of MCA underwent Wingspan Stent successfully.All of the patients finished follow-up except two patients(6.7％ ) who died in the first three months after stenting.At the sixth months follow-up,in-stent restenosis was observed in 7 patients( 23.3％ ) with average (69.0 ± 9.8 )％ in-stent restenosis degree.However,no additional in-stent restenosis was found at the twelfth month,two patients among the 7 with in-tent restenosis were suffered with artery occlusion in stent.Conclusion In-stent restenosis after Wingspan stenting in middle cerebral artery was more common during the first six months,and 85.7％ with ischemic stroke.It was worthy of paying attention to prevent in-stent restenosis at the first six months after stenting. Key words: Middle cerebral artery; Stents; Angiography,digital subtraction