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- W2072904489 abstract "Heparin-induced thrombocytopenia and/or thrombosis (HITT) are serious complications of heparin treatment. The incidence, as previously reported, varies widely and, in consequence, is not precisely known. Moreover, most reports only concern clinically defined heparin-induced thrombocytopenia. Therefore we carried out a prospective study of the incidence of serologically confirmed HITT. All patients admitted to the Departments of Cardiology and Neurology of our institution with an indication for treatment with therapeutic-dose intravenous unfractionated heparin were enrolled in the study. The patients were examined daily for the occurrence of thromboembolic complications. Regular platelet counts and tests for the presence of heparin-dependent antibodies were carried out using two different tests: a quantitative platelet factor 4/heparin (PF4/hep) Elisa, and a functional test, the heparin-induced platelet activation assay (HIPAA). HITT was defined as a rapidly occurring (within 5 d) decrease of the platelet count from normal values of >120 ×109 l to <60 ×109 l or to <100 ×109 l if there was a rapid fall of >50% of starting value or >30% with concomitant acute thrombosis. The observed incidence of HITT was 1/358 patients (0.3%, 95% confidence limits 0.01–1.5%). However, Elisa PF4/hep specific IgG antibodes were demonstrated in nine (2.5%) and IgM antibodies in seven (2.0%) of 358 patients. 30/358 patients (8.4%) had platelet activating antibodies in the HIPAA. We conclude that the incidence of serologically confirmed HITT in this study is very low (0.3%) in patients with cardiac and neurologic diseases treated with intravenous unfractionated heparin. The frequency of heparin-dependent antibodies without concomitant occurrence of thrombocytopenia is much higher." @default.
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- W2072904489 date "1997-03-01" @default.
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- W2072904489 title "Heparin-induced thrombocytopenia and thrombosis: a prospective analysis of the incidence in patients with heart and cerebrovascular diseases" @default.
- W2072904489 doi "https://doi.org/10.1046/j.1365-2141.1997.d01-2056.x" @default.
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