This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Nakao, S. Articles by Grossman, W. Search for Related Content PubMed PubMed Citation Articles by Nakao, S. Articles by Grossman, W.

Circulation, Vol 73, 579-585, Copyright © 1986 by American Heart Association

ARTICLES

Effects of supine and lateral positions on cardiac output and intracardiac pressures: an experimental study

S Nakao, PC Come, MJ Miller, S Momomura, P Sahagian, BJ Ransil and W Grossman

Hemodynamic measurements in human subjects and in experimental animals are generally made in the supine position; not much attention is paid to potential beneficial or harmful effects of right or left lateral positions on cardiac output or other hemodynamic variables. To evaluate the potential influence of such positional changes on cardiac performance, we measured cardiac output and left and right ventricular pressures (with micromanometer catheters) in anesthetized experimental animals (eight dogs and nine pigs) in the supine, right lateral, and left lateral positions. Cardiac output increased from supine to left lateral (mean +/- SD, 2.6 +/- 0.9 to 3.1 +/- 1.0 liters/min; p less than .001) and from supine to right lateral positions (2.6 +/- 0.9 to 3.1 +/- 1.1 liters/min; p less than .001). There was an associated decrease in arteriovenous oxygen saturation difference from supine to left lateral position (31 +/- 8% to 24 +/- 4%; p less than .001) and from supine to right lateral position (32 +/- 9% to 25 +/- 6%; p less than .001). Left ventricular systolic and end-diastolic pressures increased from supine to left lateral (128 +/- 17/9 +/- 2 to 147 +/- 19/16 +/- 4 mm Hg; both p less than .001) and from supine to right lateral positions (128 +/- 19/9 +/- 2 to 141 +/- 16/16 +/- 7 mm Hg; p less than .01 and p less than .001, respectively).(ABSTRACT TRUNCATED AT 250 WORDS)

This article has been cited by other articles:

				M M Theisen, M Maas, M A G. Hartlage, F Ploner, S M Niehues, H K Van Aken, T P Weber, and J K Unger Ventral recumbency is crucial for fast and safe orotracheal intubation in laboratory swine Lab Anim, January 1, 2009; 43(1): 96 - 101. [Abstract] [Full Text] [PDF]

				M. Siepe, D. M Ruegg, M.-N. Giraud, J. Python, T. Carrel, and H. T Tevaearai Effect of acute body positional changes on the haemodynamics of rats with and without myocardial infarction Exp Physiol, July 1, 2005; 90(4): 627 - 634. [Abstract] [Full Text] [PDF]

				B. Pump, U. Talleruphuus, N. J. Christensen, J. Warberg, and P. Norsk Effects of supine, prone, and lateral positions on cardiovascular and renal variables in humans Am J Physiol Regulatory Integrative Comp Physiol, July 1, 2002; 283(1): R174 - R180. [Abstract] [Full Text] [PDF]