Coronary flow and left ventricular pressure during diastole in the anaesthetized dog.

Abstract:

:There is controversy about the effect of left ventricular pressure on resistance of the intramyocardial coronary vessels. In anaesthetized dogs the effect of left ventricular pressure on coronary flow during diastole was studied using an extracorporeal circulation and allowing the heart to contract and relax isovolumically. At constant coronary perfusion pressure of about 45 mmHg with maximal coronary vasodilatation, produced by dipyridamole, increases in diastolic left ventricular pressure to 22 mmHg, producing a volume of 50 ml, did not affect diastolic coronary flow. It is suggested that in the intact animal over the physiological range of left ventricular diastolic pressure the resistance in the coronary vessels is not affected.

journal_name

Exp Physiol

journal_title

Experimental physiology

authors

Gattullo D,Linden RJ,Losano G,Pagliaro P,Westerhof N

doi

10.1113/expphysiol.1992.sp003602

subject

Has Abstract

pub_date

1992-03-01 00:00:00

pages

397-400

issue

2

eissn

0958-0670

issn

1469-445X

journal_volume

77

pub_type

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