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- W2125291234 abstract "Background— Drug-eluting stents effectively reduce restenosis but may increase late thrombosis and delayed restenosis. Persistent polymer, the drug, or a combination of both could be responsible. Local delivery of Biolimus A9, a rapamycin derivative, from a polymer-free BioFreedom stent (Biosensors International) may prevent these complications. Methods and Results— We compared high-dose (HD) (225 μg/14 mm Biolimus A9) and low-dose (LD) (112 μg/14 mm Biolimus A9) BioFreedom stents with a polymer-coated sirolimus-eluting Cypher stent (SES) and a bare-metal stent (BMS) at 28 days and 180 days in an overstretch coronary mini-swine model with histomorphometric and histological analysis. At 28 days, there was a reduction in neointimal proliferation by HD, LD, and SES compared with BMS (neointimal thickness: HD, 0.080�0.032; LD, 0.085�0.038; SES, 0.064�0.037; BMS, 0.19�0.111 mm; P <0.001; BMS > HD/LD/SES). At 180 days, both BioFreedom stents were associated with reduced neointimal proliferation, whereas SES exhibited increased neointima (neointimal thickness: HD, 0.12�0.034; LD, 0.10�0.040; SES, 0.20�0.111; BMS, 0.17�0.099 mm; P <0.001; SES > HD/LD; BMS > LD). At 180 days, BioFreedom stents showed decreased fibrin and inflammation, including granuloma and giant cells, compared with SES. Conclusions— The polymer-free Biolimus A9-coated stent demonstrates equivalent early and superior late reduction of intimal proliferation compared with SES in a porcine model. After implantation of BioFreedom stent, delayed arterial healing was minimal, and there was no increased inflammation at 180 days compared with SES implantation. The use of polymer-free stents may have a potential long-term benefit over traditional polymeric-coated drug-eluting stents." @default.
- W2125291234 created "2016-06-24" @default.
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- W2125291234 date "2010-04-01" @default.
- W2125291234 modified "2023-09-26" @default.
- W2125291234 title "Polymer-Free Biolimus A9-Coated Stent Demonstrates More Sustained Intimal Inhibition, Improved Healing, and Reduced Inflammation Compared With a Polymer-Coated Sirolimus-Eluting Cypher Stent in a Porcine Model" @default.
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- W2125291234 doi "https://doi.org/10.1161/circinterventions.109.877522" @default.
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