A Comparison of Aprotinin and Lysine Analogues in High-Risk Cardiac Surgery
Dean A. Fergusson, M.H.A., Ph.D., Paul C. Hébert, M.D., M.H.Sc., C. David Mazer, M.D., Stephen Fremes, M.D., Charles MacAdams, M.D., John M. Murkin, M.D., Kevin Teoh, M.D., M.Sc., Peter C. Duke, M.D., Ramiro Arellano, M.D., M.Sc., Morris A. Blajchman, M.D., Jean S. Bussières, M.D., Dany Côté, M.D., Jacek Karski, M.D., Raymond Martineau, M.D., James A. Robblee, M.D., M.B.A., Marc Rodger, M.D., M.Sc., George Wells, Ph.D., Jennifer Clinch, M.A., Roanda Pretorius, M.Sc., for the BART Investigators
Background Antifibrinolytic agents are commonly used duringcardiac surgery to minimize bleeding and to reduce exposureto blood products. We sought to determine whether aprotininwas superior to either tranexamic acid or aminocaproic acidin decreasing massive postoperative bleeding and other clinicallyimportant consequences.
Methods In this multicenter, blinded trial, we randomly assigned2331 high-risk cardiac surgical patients to one of three groups:781 received aprotinin, 770 received tranexamic acid, and 780received aminocaproic acid. The primary outcome was massivepostoperative bleeding. Secondary outcomes included death fromany cause at 30 days.
Results The trial was terminated early because of a higher rateof death in patients receiving aprotinin. A total of 74 patients(9.5%) in the aprotinin group had massive bleeding, as comparedwith 93 (12.1%) in the tranexamic acid group and 94 (12.1%)in the aminocaproic acid group (relative risk in the aprotiningroup for both comparisons, 0.79; 95% confidence interval [CI],0.59 to 1.05). At 30 days, the rate of death from any causewas 6.0% in the aprotinin group, as compared with 3.9% in thetranexamic acid group (relative risk, 1.55; 95% CI, 0.99 to2.42) and 4.0% in the aminocaproic acid group (relative risk,1.52; 95% CI, 0.98 to 2.36). The relative risk of death in theaprotinin group, as compared with that in both groups receivinglysine analogues, was 1.53 (95% CI, 1.06 to 2.22).
Conclusions Despite the possibility of a modest reduction inthe risk of massive bleeding, the strong and consistent negativemortality trend associated with aprotinin, as compared withthe lysine analogues, precludes its use in high-risk cardiacsurgery. (Current Controlled Trials number, ISRCTN15166455
[controlled-trials.com]
.)
Source Information
From the Ottawa Health Research Institute (D.A.F., P.C.H., M.R., J.C., R.P.), the University of Ottawa (D.A.F., P.C.H., J.A.R., M.R., G.W.), and the University of Ottawa Heart Institute (J.A.R., G.W.) — all in Ottawa; the University of Toronto (C.D.M., S.F., J.K.), Keenan Center/Li Ka Shing Institute, St. Michael's Hospital (C.D.M.), the Sunnybrook Health Science Centre (S.F.), and Toronto General Hospital (J.K.) — all in Toronto; the University of Calgary, the Foothills Medical Centre, and the Libin Cardiovascular Institute of Alberta — all in Calgary, AB (C.M.); the University of Western Ontario, London, ON (J.M.M.); Hamilton Health Sciences Centre (K.T.), McMaster University (K.T., M.A.B.), and the Canadian Blood Services (M.A.B.) — all in Hamilton, ON; the University of Manitoba and the Health Sciences Centre, Winnipeg, MB (P.C.D.); Queen's University, Kingston, ON (R.A.); Hôpital Laval, Institut Universitaire de Cardiologie et de Pneumologie de l'Université Laval, Laval, QC (J.S.B., D.C.); and Institut de Cardiologie de Montréal, Montreal (R.M.) — all in Canada. Dr. Martineau is deceased. This article (10.1056/NEJMoa0802395) was published at www.nejm.org on May 14, 2008.
Address reprint requests to Dr. Hébert at the Clinical Epidemiology Program, General Campus, Ottawa Health Research Institute, Box 208, 501 Smyth Rd., Ottawa, ON K1H 8L6, Canada, or at paul.hebert{at}cma.ca.
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