Safety and efficacy of low-dose intravenous enoxaparin and GP IIb/IIIa inhibitor therapy during PCI

Louis Carnendran, Robert Borkowski, Bashar Markabawi, Mark F Warner
Journal of Invasive Cardiology 2003, 15 (5): 235-8
The use of intravenous enoxaparin, a glyco-protein (GP) IIb/IIIa inhibitor, during percutaneous coronary intervention (PCI) has been shown to be safe and to possibly reduce in-hospital and 30-day major adverse cardiac events(MACE). NICE-4, a recent PCI observational study, evaluated a reduced dose of intravenous (IV) enoxaparin (0.75 mg/kg) with abciximab. However, prior PCI studies evaluating IV enoxaparin have not used percutaneous closure devices. The purpose of this study was to observe the safety and efficacy of a lower dose of IV enoxaparin (0.5 mg/kg) in conjunction with any GP IIb/IIIa inhibitor. The Angio-Seal femoral closure device was also employed as part of the treatment strategy. We administered 0.5 mg/kg IV enoxaparin and a GP IIIb/IIIa inhibitor to 75 eligible PCI patients. None received anticoagulation 24 hours prior to PCI; all received pre-procedural aspirin, post-procedural deployment of the Angio-Seal and clopidogrel therapy, and were discharged home within 36 hours. TIMI minor bleeding was 1.3%; there were no TIMI major bleeding events or major adverse cardiac events during in-hospital stay or at 30-day follow-up. Our small observational study shows that IV enoxaparin is safe and efficacious during PCI when given at a dose 33% lower than previously reported in conjunction with any GP IIb/IIIa inhibitor and Angio-Seal. However, large, randomized PCI trials are needed to confirm the clinical efficacy, safety and cost-effectiveness of lower doses of enoxaparin with GPIIb/IIIa inhibitors and vascular closure devices.

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