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  • Title: Aspirin plus clopidogrel therapy increases early venous graft patency after coronary artery bypass surgery a single-center, randomized, controlled trial.
    Author: Gao G, Zheng Z, Pi Y, Lu B, Lu J, Hu S.
    Journal: J Am Coll Cardiol; 2010 Nov 09; 56(20):1639-43. PubMed ID: 21050973.
    Abstract:
    OBJECTIVES: We sought to evaluate the effect of aspirin plus clopidogrel versus aspirin alone on saphenous vein graft occlusion at 3 months after coronary artery bypass grafting (CABG). BACKGROUND: Prevalence of graft occlusion is high after CABG. Aggressive antiplatelet therapy is expected to improve early post-operative graft patency. METHODS: From December 2007 through December 2008, 249 consecutive patients undergoing elective CABG at Fuwai Hospital were randomly assigned to 2 groups: 124 received aspirin (100 mg) plus clopidogrel (75 mg) daily (AC group), and 125 received aspirin (100 mg) alone daily (A group). Antiplatelet therapies were initiated when post-operative chest tube drainage was ≤ 30 cc/h for 2 h. All participants were invited for clinical follow-up and 64-slice multislice computed tomography angiography (MSCTA) analysis at 3 months post-operatively. Generalized estimating equations analysis was used to determine predictors of graft patency. RESULTS: One participant, from group A, died before 3-month follow-up. Of the remaining 248 patients, 224 (90.3%) underwent MSCTA. Participants had similar pre-operative and intraoperative characteristics at baseline. No significant differences were observed in intraoperative transit-time flow measurement findings or major adverse cardiac-related events. Three-month MSCTA follow-up revealed that saphenous vein graft patency was 91.6% (219 of 239) in the AC group versus 85.7% (198 of 231) in the A group (p = 0.043). In multivariate analysis, combined antiplatelet therapy independently increased venous graft patency (p = 0.045). CONCLUSIONS: Aspirin plus clopidogrel is more effective in venous graft patency than aspirin alone in the short term after CABG, but further, long-term study is needed. (The Clopidogrel and Aspirin After Surgery for Coronary Artery Disease; NCT00776477).
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