Intracoronary adenosine and papaverine do not increase myocardial systolic thickening.
Cardiovasc Res
; 25(12): 1042-50, 1991 Dec.
Article
em En
| MEDLINE
| ID: mdl-1806234
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 anaesthetized mongrel dogs were studied. MEASUREMENTS AND MAINRESULTS:
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Papaverina
/
Adenosina
/
Coração
Limite:
Animals
Idioma:
En
Revista:
Cardiovasc Res
Ano de publicação:
1991
Tipo de documento:
Article