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J Am Coll Cardiol, 1990; 16:948-956 © 1990 by the American College of Cardiology Foundation |
Department of Cardiology, University Hospital, Graz, Austria.
The efficacy of benazepril, metoprolol OROS and their combination was evaluated in 29 patients (42 to 74 years of age) with chronic stable angina and documented coronary artery disease in a placebo-controlled, double-blind, crossover trial using serial quantitated exercise testing and ambulatory electrocardiographic (ECG) monitoring. The mean (+/- SEM) exercise time was 8.5 +/- 0.7 min with placebo, 8.3 +/- 0.6 min (95% confidence interval [CI]-1.06 to 0.54) with benazepril, 9.4 +/- 0.5 min (95% CI -0.32 to 2.14) with metoprolol OROS and 9.6 +/- 0.5 min (95% CI -0.25 to 2.47) with the combination of benazepril and metoprolol OROS. The mean exercise time to the development of 1 mm ST segment depression was prolonged from 6.0 +/- 0.6 min with placebo to 6.3 +/- 0.6 min (95% CI -0.93 to 1.45) with benazepril, 7.9 +/- 0.5 min (95% CI 0.83 to 3.0) with metoprolol OROS and 8.1 +/- 0.6 min (95% CI 0.88 to 3.29) with the combination of benazepril and metoprolol OROS. Benazepril did not alter the rest or maximal heart rate, whereas metoprolol OROS alone and in combination significantly lowered the heart rate at rest and during maximal exercise. Systolic blood pressure at rest was nonsignificantly reduced, whereas diastolic blood pressure was lowered significantly by all treatments in comparison with placebo. At maximal exercise, only metoprolol OROS, whether given alone or in combination with benazepril, was able to blunt significantly systolic blood pressure and rate-pressure product.(ABSTRACT TRUNCATED AT 250 WORDS)
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