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  • Title: Stable and optimal anticoagulation is achieved with a single dose of intravenous enoxaparin in patients undergoing percutaneous coronary intervention.
    Author: Chen WH, Lau CP, Lau YK, Ng W, Lee PY, Yu CM, Ma E.
    Journal: J Invasive Cardiol; 2002 Aug; 14(8):439-42. PubMed ID: 12147872.
    Abstract:
    This study assessed the pharmacokinetics, safety and efficacy of intravenous enoxaparin in patients undergoing percutaneous coronary intervention (PCI). Sixty consecutive patients [(age, 62 11 years; female, 16%; diabetes, 18%; hypertension, 53%; prior myocardial infarction (MI), 43%] undergoing PCI (stable angina, 89%; stent, 92%; two-vessel disease, 23%; B2/C lesions, 45%) were administered intravenous enoxaparin 1 mg/kg for procedural anticoagulation. Blood samples for anti-Xa level and activated partial thromboplastin time (aPTT) were assayed from the first 20 patients before and after enoxaparin administration at the following intervals: 5, 30, 60, 90, 120, 150, 180, 210, 240, 360 and 480 minutes. Activated clotting time was assessed 5 minutes after enoxaparin administration. Bleeding complications were classified according to Thrombolysis In Myocardial Infarction (TIMI) criteria. All patients were monitored for adverse clinical events at clinic visit 4 8 weeks after hospital discharge. No TIMI major or minor bleedings occurred during hospitalization for the PCI (median stay post-PCI = 1 day). One patient (2%) developed a non-Q wave MI after the PCI and before hospital discharge. There was no death or urgent revascularization up to clinical follow-up. The peak anti-Xa level was 1.30 0.18 IU/ml (range, 1.03 1.69 IU/ml). The minimum anti-Xa level was 0.55 IU/ml 4 hours after enoxaparin. Thus, the use of intravenous enoxaparin in patients undergoing PCI is associated with a low incidence of ischemic and bleeding complications. A stable therapeutic anticoagulant effect is provided without the need for monitoring within 4 hours of enoxaparin administration.
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