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dc.contributor.authorYusuf, Salimen
dc.description.abstractDespite use of heparin and aspirin, 5–10% of patients with unstable angina develop myocardial infarction (MI) or refractory angina in the hospital. We tested the hypothesis that recombinant hirudin (lepirudin), a direct thrombin inhibitor, is superior to heparin, an indirect thrombin inhibitor, in patients with acute ischemic syndromes who were receiving aspirin. Patients (n = 10,141) with unstable angina or suspected acute MI without ST-segment elevation were randomly assigned heparin (5,000-U bolus, then 15-U/kg per hour infusion; n = 5,058) or hirudin (0.4-mg/kg bolus, then 0.15-mg/kg per hour infusion; n = 5,083) for 72 hours in a double-blind trial. The primary outcome measure was cardiovascular death or new MI at 7 days. Analysis was by intention to treat. At 7 days, 213 patients (4.2%) in the heparin group and 182 (3.6%) in the hirudin group had experienced cardiovascular death or new MI (relative risk = 0.84; 95% CI = 0.69–1.02; p = 0.077). The number of patients with cardiovascular death, new MI, or refractory angina at 7 days was 340 (6.7%) with heparin and 284 (5.6%) with hirudin (relative risk = 0.82; 95% CI = 0.70–0.96; p = 0.0125). These differences were primarily observed during the 72-hour treatment period (cardiovascular death or MI relative risk = 0.76; 95% CI = 0.59–0.99; p = 0.039; cardiovascular death, MI, or refractory angina relative risk = 0.78; 95% CI = 0.63–0.96; p = 0.019). Although there was an excess of major bleeding with hirudin requiring transfusion (59 [1.2%] vs 34 [0.7%] with heparin; p = 0.01), there was no excess in life-threatening episodes (20 in each group) or strokes (14 in each group). Data from the Organization to Assess Strategies for Ischemic Syndromes (OASIS)-2 trial suggest that a direct thrombin inhibitor, recombinant hirudin, is more effective than an indirect thrombin inhibitor, heparin, in preventing cardiovascular death, MI, or refractory angina. Recombinant hirudin also has an acceptable safety profile in patients with unstable angina or acute MI without ST-segment elevation. This trial was undertaken with the assistance of the Ballarat Base Hospital: J. Strickland; C. Tauschke; L. Taylor.en
dc.description.provenanceSubmitted by Gemma Siemensma ( on 2013-05-27T01:47:36Z No. of bitstreams: 0en
dc.description.provenanceApproved for entry into archive by Gemma Siemensma ( on 2013-05-28T05:01:59Z (GMT) No. of bitstreams: 0en
dc.description.provenanceMade available in DSpace on 2013-05-28T05:01:59Z (GMT). No. of bitstreams: 0 Previous issue date: 1999en
dc.titleDesign, baseline characteristics, and preliminary clinical results of the organization to assess strategies for ischemic syndromes-2 (OASIS-2) trial.en
dc.typeJournal Articleen
dc.bibliographicCitation.titleThe American Journal of Cardiologyen
dc.publisher.placeDallas, TX.en
dc.subject.healththesaurusRANDOMISED CONTROLLED TRIALen
dc.subject.healththesaurusMYOCARDIAL INFARCTIONen
dc.subject.healththesaurusTHROMBIN INHIBITORen
Appears in Collections:Research Output

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