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JOURNAL ARTICLE
META-ANALYSIS
Effect of Post-Primary Percutaneous Coronary Intervention Bivalirudin Infusion on Acute Stent Thrombosis: Meta-Analysis of Randomized Controlled Trials.
JACC. Cardiovascular Interventions 2016 July 12
OBJECTIVES: The aim of this study was to evaluate the efficacy of various doses of post-primary percutaneous coronary intervention (PCI) bivalirudin infusion to prevent acute stent thrombosis (AST).
BACKGROUND: In several recent randomized controlled trials, bivalirudin infusion was continued post-PCI as either a full PCI dose (Biv-Full) or a reduced dose (Biv-Low) to reduce the risk for AST. The results of these trials varied, so the authors performed a meta-analysis of RCTs to determine whether the risk for AST is dose dependent.
METHODS: Scientific databases and Web sites were searched for RCTs. A traditional meta-analysis was performed using moderator analyses and network meta-analysis using mixed-treatment comparison models to compare the efficacy of various bivalirudin doses in reducing AST.
RESULTS: Data from 5 trials including 16,294 patients were analyzed. Compared with heparin, bivalirudin increased AST risk 2-fold, but this was ameliorated by continuing Biv-Full (risk ratio: 0.90, 95% confidence interval: 0.32 to 2.54; p = 0.852). This effect was not seen with Biv-Low. Similarly, in mixed-treatment models, no difference in AST rate was found between heparin and Biv-Full (odds ratio: 0.97; 95% confidence interval: 0.36 to 2.21). After 30 days, bivalirudin decreased the risk for major bleeding by 47% compared with heparin; this benefit persisted even with continued Biv-Full post-PCI (risk ratio: 0.29; 95% confidence interval: 0.16 to 0.53; p < 0.001).
CONCLUSIONS: Although bivalirudin is associated with a greater risk for AST than heparin post-primary PCI, this limitation may be mitigated by continuing Biv-Full (not Biv-Low) 3 to 4 h post-operatively. The decrease in bleeding risk with bivalirudin compared with heparin is not compromised by this strategy.
BACKGROUND: In several recent randomized controlled trials, bivalirudin infusion was continued post-PCI as either a full PCI dose (Biv-Full) or a reduced dose (Biv-Low) to reduce the risk for AST. The results of these trials varied, so the authors performed a meta-analysis of RCTs to determine whether the risk for AST is dose dependent.
METHODS: Scientific databases and Web sites were searched for RCTs. A traditional meta-analysis was performed using moderator analyses and network meta-analysis using mixed-treatment comparison models to compare the efficacy of various bivalirudin doses in reducing AST.
RESULTS: Data from 5 trials including 16,294 patients were analyzed. Compared with heparin, bivalirudin increased AST risk 2-fold, but this was ameliorated by continuing Biv-Full (risk ratio: 0.90, 95% confidence interval: 0.32 to 2.54; p = 0.852). This effect was not seen with Biv-Low. Similarly, in mixed-treatment models, no difference in AST rate was found between heparin and Biv-Full (odds ratio: 0.97; 95% confidence interval: 0.36 to 2.21). After 30 days, bivalirudin decreased the risk for major bleeding by 47% compared with heparin; this benefit persisted even with continued Biv-Full post-PCI (risk ratio: 0.29; 95% confidence interval: 0.16 to 0.53; p < 0.001).
CONCLUSIONS: Although bivalirudin is associated with a greater risk for AST than heparin post-primary PCI, this limitation may be mitigated by continuing Biv-Full (not Biv-Low) 3 to 4 h post-operatively. The decrease in bleeding risk with bivalirudin compared with heparin is not compromised by this strategy.
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