(HealthDay News) – For patients with non-ST-segment elevation acute coronary syndromes (NSTE-ACS) undergoing a planned early invasive strategy, the novel intravenous direct factor Xa inhibitor otamixaban does not reduce the rate of ischemic events compared with unfractionated heparin plus eptifibatide, according to a study published online Sept. 1 in the Journal of the American Medical Association to coincide with presentation at the annual European Society of Cardiology Congress, held from Aug. 31–Sept. 4 in Amsterdam.

Philippe Gabriel Steg, MD, from the Université Paris-Diderot, and colleagues conducted a randomized trial that enrolled 13,229 patients with NSTE-ACS at 568 active sites in 55 countries. Participants were randomized to otamixaban (bolus and infusion; 5,105 patients) or unfractionated heparin plus eptifibatide at the time of percutaneous coronary intervention (5,466 patients).

The researchers found that the rates of a composite of all-cause death or new myocardial infarction through day seven were 5.5% in otamixaban-treated patients and 5.7% in unfractionated-heparin-plus-eptifibatide-treated patients (adjusted relative risk, 0.99; P=0.93). No differences were seen between the groups with respect to secondary end points, including procedural thrombotic complications. Otamixaban correlated with a significant increase in the primary safety outcome of Thrombosis in Myocardial Infarction major or minor bleeding (3.1% vs. 1.5%; relative risk, 2.13). Consistent results were seen across pre-specified subgroups.

“These findings do not support the use of otamixaban for patients with NSTE-ACS undergoing planned early percutaneous coronary intervention,” the authors write.

Several authors disclosed financial ties to pharmaceutical companies, including sanofi, which funded the study.

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