Paul Yock, MD

Publication Details

  • Intravascular Ultrasound Analysis of Small Vessel Lesions Treated with the Sparrow Coronary Stent System: Results of the CARE II Trial CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS Kume, T., Waseda, K., Koo, B., Yock, P. G., Botelho, R., Verheye, S., Whitbourn, R., Meredith, I., Worthley, S., Hai, K. T., Honda, Y., Abizaid, A., Fitzgerald, P. J. 2014; 83 (1): 19-24


    OBJECTIVES: The aim of this study was to evaluate the Sparrow sirolimus-eluting stent (Sparrow-SES) against the Sparrow bare-metal stent (Sparrow-BMS) and conventional balloon-expandable bare-metal stent (BMS: Driver/Micro-Driver(®) stent, Medtronic Vascular, Santa Rosa, CA). BACKGROUND: The Sparrow(®) stent (Biosensors International, Singapore) consists of a guide wire-based, self-expandable, ultra-thin nitinol stent. The performance of this device with sirolimus in a fully biodegradable polymer has not been determined. METHODS: A total of 74 patients were included in this intravascular ultrasound (IVUS) sub-study of the CARE II trial, which was a prospective, randomized, multicenter trial in the treatment of single de novo native coronary artery lesions in vessels ranging from 2.0 mm to 2.75 mm in diameter (Sparrow-SES: n = 31, Sparrow-BMS: n = 22, BMS: n = 21). RESULTS: Stent volume index (VI) was significantly increased 8-month later in Sparrow-SES and Sparrow-BMS, but not in BMS (4.0±1.0 to 4.6±1.0 mm(3) /mm, p<0.0001, 4.0±0.6 to 4.4±0.8 mm(3) /mm, p<0.05, and 5.2±1.0 to 5.1±0.9 mm(3) /mm, p=0.421, respectively). % neointimal obstruction in Sparrow-SES was significantly smaller than those in Sparrow-BMS and BMS at follow-up (17.6±9.4 vs. 36.2±13.8 and 39.9±11.1%, p<0.001). Sparrow-SES showed a mean 15% stent expansion and good suppression of neointimal proliferation, resulting in a significantly lower percentage of change in lumen VI during follow-up period (Sparrow-SES: -6.2±16.2%, Sparrow-BMS: -30.4±11.6%, BMS: -40.4±10.0%, p<0.001). CONCLUSIONS: The self-expanding Sparrow-SES demonstrated chronic stent expansion, good suppression of neointimal proliferation and resulted in a more preserved lumen in stented small vessels compared with the Sparrow-BMS and conventional balloon expandable BMS. © 2013 Wiley Periodicals, Inc.

    View details for DOI 10.1002/ccd.24867

    View details for Web of Science ID 000328631400007

    View details for PubMedID 23413202

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