Intracoronary adenosine and papaverine do not increase myocardial systolic thickening

R. Stefan Kiesz, J. Dwane Gehman, Joseph Gascho

Research output: Contribution to journalReview articlepeer-review

3 Scopus citations

Abstract

Study objective - The aim was to determine if myocardial systolic thickening increases when coronary flow is augmented by infusing intracoronary vasodilators (adenosine and papaverine).Design - Systolic thickening fraction was measured with pulsed Doppler crystals and sonomicrometer crystals before and during the intracoronary infusion of adenosine and papaverine.Subjects - Sixteen anaethetised mongrel dogs were studied.Measurements and main results - Intracoronary adenosine did not alter systemic haemodynamics, but did induce a three- to fourfold increase in myocardial blood flow. Intracoronary papaverine caused a slight decrease in systemic arterial pressure and rise in heart rate. Neither intracoronary adenosine nor intracoronary papaverine increased systolic thickening: control thickening fraction (TF%) = 20 (SEM 1)%, adenosine TF% = 18(1)%; control TF% = 22(2)%, papaverine TF% = 20(2)%.Conclusions - These experiments do not support the hypothesis that an increase in myocardial blood flow induced by intracoronary vasodilators causes an increase in myocardial systolic function.

Original languageEnglish (US)
Pages (from-to)1042-1050
Number of pages9
JournalCardiovascular Research
Volume25
Issue number12
DOIs
StatePublished - Dec 1991

All Science Journal Classification (ASJC) codes

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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