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  • Title: Heparin monitoring in the coronary care unit after percutaneous transluminal coronary angioplasty.
    Author: Varah N, Smith J, Baugh RF.
    Journal: Heart Lung; 1990 May; 19(3):265-70. PubMed ID: 2341265.
    Abstract:
    The rate of acute restenosis in patients after percutaneous transluminal coronary angioplasty (PTCA) is related to thrombotic complications triggered by the PTCA. This risk is reduced by anticoagulating the patients with heparin after the procedure. The anticoagulation state of patients receiving heparin therapy is routinely monitored with the activated partial thromboplastin time (APTT) test. In an effort to provide more timely results regarding the status of patients who are receiving heparin after PTCA, a study was conducted to see whether low-range activated clotting time measurement (LR ACT) performed at the bedside could provide information comparable to that from APTT values determined in the laboratory. The study showed that the LR ACT values were comparable to laboratory-generated APTT values (R2 = 0.68). The LR ACT data generated were superior to the APTT data in terms of timeliness and the wider range of heparin levels covered. Having these values available allowed the CCU staff to react rapidly to changes in the patient's coagulation status.
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