PMID: 235803Feb 1, 1975

Comparative effects of beta adrenergic blocking drugs

Thorax
E SowtonI Baker

Abstract

Although many different beta blockers are now in clinical use, there is very little information concerning their relative efficacy, and it is still not clear what clinical importance should be attached to properties such as positive inotropic stimulation (intrinsic sympathomimetic activity or ISA) and membrane stabilizing action ("local anaesthetic effect" or "quinidine-like effect"). In this report we compare the ability of patients with angina to exercise on a bicycle ergometer while receiving a series of commonly used beta blockers, and attempt to determine the importance of ISA. The investigation is in four parts with the drugs given orally or intravenously: statistical analysis of the results was carried out using standard methods, both parametric and non-parametric (Friedmann analysis of variance, Wilcoxon matched pairs signed ranks test) by two independent statisticians. The relevant properties of drugs included in this paper are summarized in Table I. Laboratory reports using many different animal preparations may differ from this assessment under specific conditions, and the Table is intended only as a guide to the generally accepted properties of these drugs when used clinically. Results for sotalol are included for r...Continue Reading

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Related Concepts

Visken
Intravenous Injections
Sotalol
Cardiopulmonary Exercise Test
Angina Pectoris
Laboratory Reporting
Quinidine Measurement
Clinical Trials
Hemodynamics
Alprenolol Hydrochloride

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