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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 27:759-765, April 2006
© 2006 American Society of Neuroradiology

INTERVENTIONAL

Multicenter Evaluation of a Self-Expanding Carotid Stent System with Distal Protection in the Treatment of Carotid Stenosis

M.D. Hill^a, W. Morrish^a, G. Soulez^b, A. Nevelsteen^c, G. Maleux^d, C. Rogers^e,f, K.E. Hauptmann^g, A. Bonafé^h, R. Beyarⁱ, L. Grubergⁱ, J. Schofer^j for the MAVErIC International Investigators

^a Calgary Stroke Program, Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
^b Université de Montreal, Department of Radiology, CHUM-Notre Dame, Montréal, Québec, Canada
^c Department of Vascular Surgery, University Hospital Gasthuisberg, Leuven, Belgium
^d Center for Vascular Diseases, Section of Interventional Radiology, University Hospital Gasthuisberg, Leuven, Belgium
^e Cardiovascular Division, Brigham and Women’s Hospital, Boston, Mass
^f Harvard-MIT Division of Health Sciences and Technology, Cambridge, Mass
^g Krankenhaus der Barmherzigen Brüder, Trier, Germany
^h Faculty of Medicine, Montpellier University Hospital Center, Montpellier-Nimes, France
ⁱ Division of Invasive Cardiology, Rambam Medical Center, Technion-Israel Institute of Technology, Haifa, Israel
^j Center for Cardiology and Vascular Intervention, Hamburg, Germany

Address correspondence to Michael D. Hill, Calgary Stroke Program, Department of Clinical Neurosciences, University of Calgary, Foothills Hospital, Room 1242A, 1403 29th St NW, Calgary, Alberta, T2N 2T9, Canada

PURPOSE: Carotid artery stent placement may be limited by the embolization of atheromatous material. We evaluated the safety and feasibility of the Medtronic Self-Expanding Carotid Stent (Exponent) in combination with the Medtronic Interceptor Carotid Filter System for the treatment of carotid stenosis among patients at high risk for carotid endarterectomy.

METHODS: Patients at high risk for carotid endarterectomy but amenable to percutaneous treatment with stent placement were enrolled. Clinical follow-up was performed at 30 days and 6 and 12 months postprocedure. The National Institutes of Health Stroke Scale was assessed before and within 3 days postprocedure and at 30 days and 6 months postprocedure. Angiography was performed pre- and postprocedure, and carotid duplex scans were performed at baseline and at 30 days and 6 months.

RESULTS: Fifty-two carotid procedures were performed in 51 patients (mean age, 69 years; 84% of patients were men). The major adverse event (MAE) rate (death, stroke, and myocardial infarction [MI]) at 30 days was 5.9%: 2 strokes and a single death from periprocedural MI. MAE rates after 6 and 12 months were 5.9% and 11.8%, respectively. The delivery success rate was 94.2% (49/52) for the Interceptor Filter System and 95.9% (47/49) for the Exponent Stent. The mean diameter stenosis of the target lesion was reduced from 62.4% preprocedure to 21.2% postprocedure.

CONCLUSION: High delivery success rates were achieved with a low rate of MAE (death, stroke, or MI) in a high-risk population. Treatment of carotid artery disease with the Exponent Carotid Stent combined with distal protection from the Interceptor Filter System is effective and safe.

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