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The Cardiovascular Effects of ICI 118,587: A Beta 1-adrenoceptor Partial Agonist

Overview
Journal Br J Pharmacol
Publisher Wiley
Specialty Pharmacology
Date 1982 Oct 1
PMID 6128041
Citations 51
Authors
A Nuttall
H M Snow
Affiliations
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Abstract

1 In a preparation in which cardiovascular reflexes were prevented from occurring, ICI 118,587 (1-(p-hydroxyphenoxy)-3-beta-(morpholinocarbonamido) ethylamino-2-propranol fumarate) caused dose-dependent positive chronotropic and inotropic effects upon the dog heart. 2 The increase in heart rate brought about by ICI 118,587 was about 43% of the maximum increase produced by isoprenaline. 3 For a given chronotropic effect produced by either ICI 118,587 or isoprenaline, each compound produced a similar inotropic effect as indicated by an increase in LV dp/dtmax. 4 In contrast to the direct stimulant action of ICI 118,587 on the heart no direct effects on vascular smooth muscle were observed. 5 ICI 118,587 was shown to be a competitive antagonist of the chronotropic and vasodilator effects of isoprenaline on the heart and blood vessels and of the chronotropic effects of noradrenaline on the heart. 6 It is concluded that ICI 118,587 is a selective beta 1-adrenoceptor partial agonist.

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References
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