Effects of equiblocking doses of nadolol and propranolol on left ventricular performance

Clinical Pharmacology and Therapeutics
M M Le WinterJ Verba


Nadolol, a recently developed noncardioselective beta-adrenergic blocker, has the potential advantages of a longer oral half-life (t 1/2) than propranolol and, in animal studies, markedly fewer direct myocardial depressant effects. Neither the relative intravenous potency of nadolol and propranolol nor the comparative effects of the 2 drugs on left ventricular performance has been studied in man. We compared equiblocking intravenous doses of nadolol and propranolol in 10 subjects with ischemic wall-motion disorders. Nadolol was on the average 6.2 times as potent on a milligram-for-milligram basis. Both drugs decreased resting heart rate (p less than 0.02) and produced small rises in both mean pulmonary artery (p less than 0.03) and mean pulmonary artery wedge (p less than 0.03) pressures without significantly reducing the cardiac output. Both drugs also produced depression of the radionuclide ejection fraction (p less than 0.002). There were no significant differences between the effects of the 2 drugs on any of the aforementioned variables. Thus, the effects of nadolol on left ventricular performances are similar to those of propranolol. Because of its long oral t 1/2, nadolol may prove to be a clinically useful drug.


Jan 1, 1981·Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie. Albrecht Von Graefe's Archive for Clinical and Experimental Ophthalmology·G K Krieglstein, D Kontić
Jan 1, 1981·Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie. Albrecht Von Graefe's Archive for Clinical and Experimental Ophthalmology·G K Krieglstein
Sep 17, 1981·The New England Journal of Medicine·W H Frishman

Related Concepts

Aspects of Radionuclide Imaging
Left Ventricular Structure
Myocardial Dysfunction
beta-Adrenergic Blocker [EPC]
Pulmonary Artery Structure

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