A simple experimental index for the evaluation of inotropic responses

Samuel H.H. Chan*, B. T. Ong

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

15 Scopus citations

Abstract

The validity of the first derivative of systemic arterial pressure (SAdP/dt) as an indirect experimental index for the evaluation of inotropic responses was ascertained in rats anesthetized with pentobarbital sodium (40 mg/kg, i.p.), using the first derivative of left ventricular pressure (LVdP/dt) as the reference. We observed highly significant qualitative and quantitative (p < 0.001) correlations between these two parameters, under five well-established experimental cardiovascular perturbations that are known to promote inotropic actions, viz, vagosympathetic trunk stimulation; intravenous administration of pentobarbital, epinephrine, or phenylephrine; and temporary common carotid artery occlusion. Preliminary experiments using isometric ventricular contraction as the reference also confirmed these observations. It is suggested that the SAdP/dt may qualify, at the systemic level, as an easily accessible experimental index for ventricular contractility.

Original languageEnglish
Pages (from-to)23-29
Number of pages7
JournalJournal of Pharmacological Methods
Volume18
Issue number1
DOIs
StatePublished - 08 1987
Externally publishedYes

Keywords

  • First derivative of systemic arterial pressure
  • Inotropic responses
  • Rat

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