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[Thrombopenia induced by heparin].

J Allal, J P Petitalot, J Y Poupet

    Annales De Cardiologie Et D'Angeiologie
    |July 1, 1984
    PubMed
    Summary
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    Heparin-induced thrombocytopenia (HIT) is a serious complication causing blood clots. Promptly stopping heparin and monitoring platelet counts can prevent severe outcomes like death or limb amputation.

    Area of Science:

    • Hematology
    • Immunology
    • Pharmacology

    Context:

    • Heparin is a widely used anticoagulant.
    • Heparin-induced thrombocytopenia (HIT) is a rare but severe adverse effect.
    • HIT can lead to life-threatening thrombotic complications.

    Purpose:

    • To report three cases of heparin-induced thrombocytopenia.
    • To highlight the clinical presentation, diagnosis, and management of HIT.
    • To emphasize the importance of early recognition and intervention.

    Summary:

    • Three cases of HIT are presented, two with venous thromboembolism and one with arterial embolism.
    • Thrombocytopenia developed 10-15 days after heparin initiation, with platelet counts below 100,000/mm³.
    • Diagnosis involves platelet aggregation tests and observing platelet count normalization after heparin cessation; anti-platelet antibodies suggest an immuno-allergic mechanism.

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    Impact:

    • HIT necessitates immediate heparin discontinuation and alternative anticoagulation (e.g., vitamin K antagonists, low-molecular-weight heparin).
    • Systematic platelet count monitoring is crucial for patients on heparin for over 8 days.
    • Early detection and management of HIT can prevent severe morbidity, including death and limb amputation.