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European Heart Journal 1988 9(5):513-519;
Copyright © 1988 by the European Society of Cardiology.
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© 1988 The European Society of Cardiology

Effects of surgical versus medical treatment of long-term prognosis in angina at rest: an observational non-randomized study of 400 patients

S. DE SERVI, C. BERZUINI{dagger}, S. GHIO, M. FERRARIO, E. POMA, A. SCIRÈ, T. RAGNI*, M. VIGANO*, C. MONTEMARTINI and G. SPECCHIA

{dagger}Divisione di Cardiologia Policlinico San Matteo, Istituto di Ricovero e Cura a Carattere Scientifico Pavia, Italy
*Divisione di Cardiochirurgia, Policlinico San Matteo, Istituto di Ricovero e Cura a Carattere Scientifico Pavia, Italy

Received 2 September 1987; .

Address for correspondence: Stefano De Servi, M.D., Divisione di Cardiologia, Policlinico S. Matteo, 27100 Pavia, Italy.

Abstract

The effect of surgical versus medical treatment on long-term prognosis in angina at rest was assessed using the Cox regression model for survival analysis in 400 patients complaining of recurrent episodes of resting chest pain associated with transient repolarization changes. The surgical group included 185 patients, and the medical group 215. Surgically treated patients more frequently had two- and three-vessel disease, while single-vessel disease prevailed in medically treated patients (P<0·01). No difference between the two groups was found in mean values of left ventricular end diastolic pressure and ejection fraction. Three variables were identified as independent predictors of prognosis in all patients: left ventricular end-diastolic pressure (P < 0·001), age > 45 years (P < 0·05), and number of diseased vessels (P < 0·05). Treatment modality did not result in different long-term survival in the entire population. However, patients with three-vessel disease had a better outcome with surgical than with medical therapy (P < 0·05).

Although our conclusions must be tempered by consideration of the limitations of non-randomized studies, these results show that surgical treatment may improve survival in patients with angina at rest and three-vessel disease.

Key Words: Unstable angina • bypass surgery • medical treatment


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