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Efficacy and safety of bivalirudin in patients with diabetes mellitus undergoing percutaneous coronary intervention in current clinical practice

Luke K Kim, S Chiu Wong, Robert M Minutello, Geoffrey Bergman, Dmitriy N Feldman
Journal of Invasive Cardiology 2010, 22 (3): 94-100
20197573

OBJECTIVES: This study sought to evaluate the short- and long-term efficacy and safety of bivalirudin in diabetic patients undergoing percutaneous coronary intervention (PCI) in contemporary clinical practice.

BACKGROUND: Early trials of platelet glycoprotein (GP) IIb/IIIa inhibitors have suggested a survival benefit in diabetic patients undergoing PCI. More recently, randomized trials have demonstrated that diabetic patients have similar protection from acute ischemic events, while lowering the risk of bleeding complications, when treated with bivalirudin monotherapy versus heparin plus GP IIb/IIIa blockade. However, the impact of bivalirudin use on long-term outcomes in diabetic patients undergoing PCI remains unclear.

METHODS AND RESULTS: Using the Cornell Angioplasty Registry, we studied 786 consecutive diabetic patients undergoing urgent or elective PCI with a mean clinical follow up of 24.6 +/- 7.8 months. Of these, 428 patients (54.5%) received bivalirudin monotherapy and 358 patients (45.5%) received unfractionated heparin (UFH) plus GP IIb/IIIa inhibition. The incidence of in-hospital death (0% vs. 0.3%; p = 0.46), post-procedural myocardial infarction (MI) (4.7% vs. 7.0%; p = 0.169), and major adverse cardiovascular events (MACE) (death, MI, stroke or urgent revascularization) (4.9% vs. 7.3%; p = 0.176) was similar in the two groups, with less minor bleeding (9.6% vs. 14.5%; p = 0.035) in the bivalirudin vs. UFH plus GP IIb/IIIa inhibitor group, respectively. By the end of follow up, there were 38 (8.9%) deaths in the bivalirudin vs. 19 (5.3%) deaths in the GP IIb/IIIa inhibitor arm (hazard ratio [HR] 1.8, 95% confidence interval [CI] 1.0-3.1; p = 0.04). However, after a propensity score-adjusted multivariate Cox regression analysis, there was no longer a significant difference in long-term mortality between the two groups (HR 1.63; chi(2) = 2.61; 95% CI 0.90-2.94; p = 0.106).

CONCLUSIONS: These findings indicate that in diabetic patients, bivalirudin monotherapy results in similar protection from acute ischemic events and long-term mortality, while lowering the risk of minor bleeding in comparison to UFH plus GP IIb/IIIa inhibition.

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