Long-term results of carotid artery stents to manage symptomatic carotid artery stenosis and factors that affect outcome

Circulation. Cardiovascular Interventions
Marc S RandallPeter Gaines

Abstract

Limited data are available about the long-term outcomes of the use of carotid artery stents in symptomatic patients and the impact of patient variables on the durability of endovascular carotid procedures. Outcome data previously reported from registry series mix symptomatic and asymptomatic patients. We present analysis of long-term follow-up, with independent neurological assessment, for patients with symptomatic high-grade carotid lesions undergoing stenting to identify patients at risk of recurrence. Prospectively collected data on 563 carotid stenting procedures in a single center were analyzed. Univariate and multivariate techniques were used to identify risk groups and beneficial technical adaptations. Ipsilateral stroke rates for all patients were 4.8%, 7.0%, and 9.5% at 30 days, 1 year, and 4 years, respectively. The rates improved to 2.7%, 4.1%, and 4.5% when patients were treated with optimal therapy. Retinal events had a lower risk of long-term recurrent ipsilateral stroke (hazard ratio=0.228, CI=0.082 to 0.632, P=0.004) than cerebral events. A recurrent or residual stenosis of >50% had a statistically significant effect on long-term stroke recurrence in multivariate analysis (hazard ratio=2.187, CI=1.173 to 4.078, ...Continue Reading

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