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(Circulation. 1996;93:412-422.)
© 1996 American Heart Association, Inc.

Articles

Heparin-Coated Palmaz-Schatz Stents in Human Coronary Arteries

Early Outcome of the Benestent-II Pilot Study

Patrick W. Serruys, MD, PhD; Håkan Emanuelsson, MD; Wim van der Giessen, MD, PhD; Anthony C. Lunn, PhD; Ferdinand Kiemeney, MD, PhD; Carlos Macaya, MD; Wolfgang Rutsch, MD; Guy Heyndrickx, MD; Harry Suryapranata, MD, PhD; Victor Legrand, MD; Jean Jacques Goy, MD; Pierre Materne, MD; Hans Bonnier, MD, PhD; Marie-Claude Morice, MD; Jean Fajadet, MD; Jorge Belardi, MD; Antonio Colombo, MD; Eulogio Garcia, MD; Peter Ruygrok, MD; Peter de Jaegere, MD, PhD; Marie-Angèle Morel, BSc; on behalf of the Benestent-II Study Group

From the Thoraxcenter, Department of Interventional Cardiology, Erasmus University, Rotterdam, Netherlands.

Correspondence to Prof P.W. Serruys, MD, PhD, Thoraxcenter, Department of Interventional Cardiology, Erasmus University, Dr Molewaterplein 40, 3015 GD Rotterdam, Netherlands.

Background The purpose of the Benestent-II Pilot Study was to evaluate the safety of delaying and eliminating anticoagulant therapy in patients receiving a heparin-coated stent in conjunction with antiplatelet drugs.

Methods and Results The study consisted of three initial phases (I, II, III) during which resumption of heparin therapy after sheath removal was progressively deferred by 6, 12, and 36 hours. In phase IV, coumadin and heparin were replaced by 250 mg ticlopidine and 100 mg aspirin. Of the 207 patients with stable angina pectoris and a de novo lesion in whom heparin-coated stent implantation was attempted, implantation was successful in 202 patients (98%). Stent thrombosis did not occur during all four phases, and the overall clinical success rate at discharge was 99%. Bleeding complications requiring blood transfusion or surgery fell from 7.9% in phase I to 5.9%, 4%, and 0% in the three following phases. Hospital stay was 7.4, 6.1, 7.2, and 3.1 days for the consecutive phases. The restenosis rate for the combined four phases was 13% (15% in phase I, 20% in phase II, 11% in phase III, and 6% in phase IV). The overall rate of reintervention for the four phases was 8.9%. At 6 months, 84%, 75%, 94%, and 92% of the patients of phases I to IV, respectively, were event free. For the four phases, the event-free rate was 86%, which compares favorably with the rate observed in the Benestent-I study (80%; relative risk, 0.68 [0.45 to 1.04]).

Conclusions The implantation of stents coated with polyamine and end-point–attached heparin in stable patients with one significant de novo coronary lesion is well tolerated, is associated with no (sub)acute stent thrombosis, and results in a favorable event-free survival after 6 months.

Key Words: heparin • stents • anticoagulants • angina • coating

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