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Gao, Runlin; Yang, Yuejin; Han, Yaling; Huo, Yong; Chen, Jiyan; Yu, Bo; Su, Xi; Li, Lang; Kuo, Hai-Chien; Ying, Shih-Wa; Cheong, Wai-Fung; Zhang, Yunlong; Su, Xiaolu; Xu, Bo; Popma, Jeffery J; Stone, Gregg W
Journal of the American College of Cardiology, 12/2015, Volume: 66, Issue: 21Journal Article
The everolimus-eluting bioresorbable vascular scaffold (BVS) is designed to achieve results comparable to metallic drug-eluting stents at 1 year, with improved long-term outcomes. Whether the 1-year clinical and angiographic results of BVS are noninferior to current-generation drug-eluting stents has not been established. This study sought to evaluate the angiographic efficacy and clinical safety and effectiveness of BVS in a randomized trial designed to enable approval of the BVS in China. Eligible patients with 1 or 2 de novo native coronary artery lesions were randomized to BVS or cobalt-chromium everolimus-eluting stents (CoCr-EES) in a 1:1 ratio stratified by diabetes and the number of lesions treated. Angiographic and clinical follow-up were planned at 1 year in all patients. The primary endpoint was angiographic in-segment late loss (LL), powered for noninferiority with a margin of 0.15 mm. A total of 480 patients were randomized (241 BVS vs. 239 CoCr-EES) at 24 sites. Acute clinical device success (98.0% vs. 99.6%; p = 0.22) and procedural success (97.0% and 98.3%; p = 0.37) were comparable in BVS- and CoCr-EES-treated patients, respectively. The primary endpoint of in-segment LL at 1 year was 0.19 ± 0.38 mm for BVS versus 0.13 ± 0.38 mm for CoCr-EES; the 1-sided 97.5% upper confidence limit of the difference was 0.14 mm, achieving noninferiority of BVS compared with CoCr-EES (pnoninferiority = 0.01). BVS and CoCr-EES also had similar 1-year rates of target lesion failure (cardiac death, target vessel myocardial infarction, or ischemia-driven target lesion revascularization; 3.4% vs. 4.2%, respectively; p = 0.62) and definite/probable scaffold/stent thrombosis (0.4% vs. 0.0%, respectively; p = 1.00). In the present multicenter randomized trial, BVS was noninferior to CoCr-EES for the primary endpoint of in-segment LL at 1 year. (A Clinical Evaluation of Absorb Bioresorbable Vascular Scaffold Absorb BVS System in Chinese Population-ABSORB CHINA Randomized Controlled Trial RCT; NCT01923740).
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