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[Experimental and clinical results with the thrombin inhibitor Argatroban].

Argatroban is the smallest anticoagulant molecule of direct thrombin inhibitors. The main attributes of this synthetic drug are its rapid onset of anti-thrombin action, the rapid reversibility of its anticoagulant effect, potent inhibition of clot-bound thrombin, the absence of antibody formation and no need for dosage adjustment in patients with renal impairment. It is eliminated by hepatic metabolism. These properties make argatroban a predictable anticoagulant with intravenous use in a routine clinical setting. Argatroban is approved in the US and Canada for both prophylaxis and treatment of thrombosis in patients with heparin-induced throm-bocytopenia (HIT) and in the US as an antithrombotic agent during percutaneous coronary interventions in patients with HIT or a history of HIT. Preliminary reports document the feasibility of using argatroban for anticoagulation during hemodialysis and as adjunct to thrombolysis for treatment of myocardial infarction. Current recommendations for argatroban monitoring are to use the aPTT (activated partial thromboplastin time) for low doses and the ACT (activated clotting time) for high doses. The specific inhibition of thrombin can be measured with the ECT (ecarin clotting time).