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Bivalirudin

Journal: Thrombosis and Haemostasis
ISSN: 0340-6245
Topic:

Current use of biologicals in thrombosis and haemostasis

DOI: http://dx.doi.org/10.1160/TH07-10-0644
Issue: 2008: 99/5 (May) pp. 799-983
Pages: 830-839

Bivalirudin

Theodore E. Warkentin1, Andreas Greinacher2, Andreas Koster3

1Department of Pathology and Molecular Medicine, and Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada; 2Department of Immunology and Transfusion Medicine, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany; 3Department of Anesthesia, Deutsches Herzzentrum Berlin, Berlin, Germany

Keywords

direct antithrombin agents, Direct thrombin inhibitors, Bivalirudin

Summary

Bivalirudin is a direct thrombin inhibitor (DTI) frequently used for anticoagulation in the setting of invasive cardiology, particularly percutaneous coronary intervention (PCI). Bivalirudin has a unique pharmacologic profile: unlike other marketed DTIs, it undergoes predominant non-organ elimination (proteolysis), and has the shortest half-life (~25 min). Its affinity for thrombin is intermediate between that of lepirudin (highest) and argatroban (lowest) — this helps explain why it interferes with functional clotting assays to an extent intermediate between that achieved by these two other DTIs. This effect is best known for the PT (INR) — higher affinity for thrombin corresponds to lower molar DTI requirements to prolong the APTT; in turn, lower concentrations required for APTT prolongation (and, presumably, in-vivo effect) result in reduced PT (INR) prolongation. Bivalirudin is primarily used for its first FDA-approved indication, namely anticoagulation during percutaneous transluminal coronary angioplasty ("balloon angioplasty"), the most frequent type of PCI. Bivalirudin is also indicated for PCI with provisional use of glycoprotein IIb/IIIa antagonist therapy, and for patients with, or at risk of, heparin-induced thrombocytopenia (HIT), or HIT with thrombosis syndrome (HITTS), undergoing PCI. The bivalirudin development program has used a "quadruple" endpoint comprising a "triple" efficacy endpoint plus major bleeding — this approach anticipated the subsequent emphasis on strategies to improve clinical outcomes through bleeding reduction. Besides summarizing the key trials evaluating bivalirudin use for acute coronary syndrome (especially employing PCI), we review also the studies of bivalirudin as anticoagulant for "on-" and "offpump" cardiac surgery, including both HIT and non-HIT situations

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