Published online before print November 7, 2004, doi: 10.1161/01.CIR.0000148956.93631.4D
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(Circulation. 2004;110:3627-3635.)
© 2004 American Heart Association, Inc.
Late-Breaking Clinical Trials |
Randomized Clinical Trial of Abciximab in Diabetic Patients Undergoing Elective Percutaneous Coronary Interventions After Treatment With a High Loading Dose of Clopidogrel
From Deutsches Herzzentrum, Munich, Germany (J.M., A.K., H.S., A.D., N.v.B., A.S.); 1 Medizinische Klinik rechts der Isar, Munich, Germany (J.D., H.B., J.P., A.S.); Medizinische Klinik I, Garmisch-Partenkirchen, Germany (F.D.); and Duke Clinical Research Institute, Durham, NC (P.B.B.).
Correspondence to Adnan Kastrati, MD, Deutsches Herzzentrum, Lazarettstrasse 36, 80636 Munich, Germany. E-mail kastrati{at}dhm.mhn.de
Received October 8, 2004; revision received October 13, 2004; accepted October 13, 2004.
Background— Diabetic patients are at increased risk of adverse outcomes after percutaneous coronary interventions. Although subset analyses suggest particular benefit from the administration of abciximab in diabetic patients, no dedicated large randomized trials have been performed in diabetic patients undergoing percutaneous coronary intervention, and certainly not after pretreatment with a high loading dose of clopidogrel.
Methods and Results— This study (Intracoronary Stenting and Antithrombotic Regimen: Is Abciximab a Superior Way to Eliminate Elevated Thrombotic Risk in Diabetics [ISAR-SWEET] Study) enrolled 701 diabetic patients with coronary artery disease who underwent an elective percutaneous coronary intervention after pretreatment with a 600-mg dose of clopidogrel >2 hours before the procedure: 351 patients were randomly assigned to abciximab and 350 patients to placebo. The primary end point of the trial was the composite incidence of death and myocardial infarction at 1 year. The frequency of angiographic restenosis (diameter stenosis 
50%) was the secondary end point. The incidence of death or myocardial infarction was 8.3% in the abciximab group and 8.6% in the placebo group (P=0.91), with a relative risk of 0.97 (95% CI, 0.58 to 1.62). The incidence of angiographic restenosis was 28.9% in the abciximab group and 37.8% in the placebo group (P=0.01), with a relative risk of 0.76 (95% CI, 0.62 to 0.94). The incidence of target lesion revascularization was 23.2% in the abciximab group and 30.4% in the placebo group (P=0.03).
Conclusions— The findings of this study do not support a significant impact of abciximab on the risk of death and myocardial infarction in diabetic patients undergoing percutaneous coronary interventions after pretreatment with a 600-mg loading dose of clopidogrel at least 2 hours before the procedure. The present findings suggest, however, that abciximab reduces the risk of restenosis in diabetic patients receiving coronary bare metal stents.
Key Words: coronary disease • diabetes mellitus • platelets • restenosis • stents
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