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(Circulation. 1995;91:2882-2890.)
© 1995 American Heart Association, Inc.
Articles |
From the St Louis (Mo) University Health Sciences Center (F.V.A., T.J.D.); Cleveland Clinic (Ohio) (E.J.T.); Texas Heart Institute, Houston (J.J.F.); Centocor, Inc, Malvern, Pa (K.A., H.F.W.); Geisinger Medical Center, Danville, Pa (J.C.B.); Arizona Heart Institute and Foundation, Phoenix (R.R.H.); Duke University Medical Center, Durham, NC (K.S., R.M.C.); Deborah Heart Center, Brown Mill, NJ (M.T.); Graduate Hospital, Philadelphia, Pa (R.G.); North Memorial Medical Center, Robbinsdale, Minn (G.H.); and Lutheran General Hospital, Park Ridge, Ill (M.R.).
Correspondence to Frank V. Aguirre, MD, Division of Cardiology, St Louis University Health Sciences Center, 3635 Vista Ave at Grand Blvd, St Louis, MO 63110.
Background The potential for novel antiplatelet and antithrombin agents to contribute to periprocedural bleeding complications of percutaneous coronary revascularization is poorly defined. In the Evaluation of c7E3 Fab in Preventing Ischemic Complications of High-Risk Angioplasty (EPIC) trial, the periprocedural use of aspirin, heparin, and a chimeric antibody to the platelet glycoprotein IIb/IIIa integrin c7E3 Fab in 2099 patients significantly reduced postprocedural ischemic complications and 6-month clinical restenosis but was associated with increased procedural bleeding complications. We review these complications and describe clinical and procedural variables associated with increased bleeding complications in the EPIC trial.
Methods and Results Patients with high-risk clinical or lesion morphological characteristics were randomized to receive placebo bolus plus placebo infusion, c7E3 Fab bolus plus placebo infusion, or c7E3 Fab bolus plus c7E3 Fab infusion. Patients received periprocedural aspirin and intravenous heparin continued for a minimum of 12 hours after the procedure. Outcomes reflecting bleeding complications were measured: transfusions, decreased hemoglobin, and an index including both parameters. Major bleeding complications unrelated to bypass surgery occurred in 3.3%, 8.6%, and 10.6%, and blood product transfusions were used in 7.5%, 14.0%, and 16.8% of patients treated with placebo, bolus c7E3 Fab, and bolus plus infusion c7E3 Fab, respectively (both P<.001). Most major bleeding complications occurred at the femoral access site, regardless of treatment. Intracranial hemorrhage (0.3%) and death (0.09%) attributable to major bleeding complications were rare. Multivariable regression analyses identified several variables significantly and independently related to major bleeding complications or greater blood loss, including greater age, female sex, lower weight, c7E3 Fab therapy, and duration and complexity of the index procedure. Major bleeding complications and blood loss in patients receiving bolus plus infusion were not significantly greater than in those receiving bolus alone (P=.38 and P=.14, respectively).
Conclusions Bleeding complications unrelated to bypass surgery were two to three times more frequent in patients receiving c7E3 Fab than in those receiving placebo, but most were transient and well tolerated. Risk-factor analysis and modification of concomitant antithrombotic and antiplatelet treatment strategies may aid in reducing bleeding complications and enhancing clinical benefit in patients receiving c7E3 Fab during percutaneous coronary revascularization.
Key Words: angioplasty platelet aggregation inhibitors clinical trials catheterization
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