PMID: 41057Sep 1, 1979

Haemodynamic effects of the carboxylic ionophore monensin when administered before and during shock induced by E. coli endotoxin

The Journal of Pharmacy and Pharmacology
D McCaig, J R Parratt

Abstract

The haemodynamic effects of the carboxylic ionophore monensin have been examined in cats anaesthetized with sodium pentobarbitone. Marked increases in left ventricular dP/dtmax (and dP/dt at fixed isovolumic pressures) and slight increases in cardiac output and stroke volume occurred, indicating increased myocardial contractility. Heart rate was unchanged but systemic arterial pressure was substantially increased. Satisfactory increases in contractility and arterial pressure were obtained when monensin was infused intravenously in a total dose of 0.25 mg kg-1 over 10 min. Larger doses, especially if rapidly injected, resulted in very marked increases in myocardial contractility leading eventually to cardiac failure. The haemodynamic effects of monensin were markedly reduced during shock induced by E. coli endotoxin and there was unfortunately no evidence to suggest that this extremely potent compound might be potentially beneficial in this form of profound cardiovascular shock.

References

Apr 1, 1975·British Journal of Pharmacology·J R Parratt, R M Sturgess
Nov 15, 1978·European Journal of Pharmacology·E L Watson
Jan 1, 1976·Annual Review of Biochemistry·B C Pressman
Dec 30, 1975·Annals of the New York Academy of Sciences·B C Pressman, N T deGuzman
Feb 1, 1976·British Journal of Pharmacology·A K Abaitey, J R Parratt
Jan 1, 1974·Clinical and Experimental Pharmacology & Physiology·J R Parratt, E Winslow
Jun 1, 1974·Circulation·N T De Guzman, B C Pressman

Related Concepts

Felis catus
Endotoxins
Alkalescens-Dispar Group
Tetrahydrofurans
Hemodynamics
Rumensin
Endotoxic Shock

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