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Background: Myocardial revascularization with drug-eluting stents (DESs) is emerging as an alternative to conventional coronary artery bypass surgery in patients with multivessel coronary artery disease (MV-CAD). First-generation DESs have yielded equivalent safety results at mid-term compared with surgery, but inferior efficacy in preventing the recurrence of ischemic symptoms. The outcome of percutaneous coronary intervention with a second-generation everolimus DES as compared with a paclitaxel DES in patients with MV-CAD has not been established.
Aim Of The Study: The aim of the study is the assessment of the efficacy and performance of the XIENCE V everolimus-eluting stent in the treatment of de-novo coronary artery lesions in patients with MV-CAD.
Study Design: The study is composed of two parts: a prospective, double arm, randomized multicenter trial to assess the angiographic efficacy of the XIENCE V everolimus-eluting coronary stent system (EECSS) compared with the Taxus Liberté Paclitaxel Eluting Coronary Stent System (Taxus Liberté Stent) and a prospective, open-label, single arm, controlled registry to analyze the clinical efficacy and safety of XIENCE V EECSS at mid-term and long-term follow-up in patients treated for MV-CAD.
Endpoints: For the EXECUTIVE randomized trial, the primary endpoint is in-stent late lumen loss at 9 months. For the EXECUTIVE registry, the primary endpoint is a composite of all death, myocardial infarction (Q-wave and non-Q-wave), and ischemia-driven target vessel revascularization at 12 months. The study will be conducted at 30 study centers in Italy and 600 patients will be enrolled in total: 200 patients will be enrolled (1: 1) in the randomized trial and 400 patients will enter the registry.
Sample Size: It was calculated that, assuming a mean in-stent late lumen loss of 0.20 +/- 0.41 mm in the XIENCE V EECSS arm and 0.30 +/- 0.53 mm in the Taxus Liberté stent arm, and a noninferiority margin delta of 0.12 (according to the SPIRIT III results), the analysis of 81 lesions per arm would provide over 90% power. Therefore, 200 patients will be enrolled to account for dropouts.
Conclusion: The present study is expected to provide as yet unavailable information about the performance of second-generation stents in the specific setting of patients with MV-CAD.
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http://dx.doi.org/10.2459/JCM.0b013e3283331e69 | DOI Listing |
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