Document Detail

Effects of supine and lateral positions on cardiac output and intracardiac pressures: an experimental study.
MedLine Citation:
PMID:  3948362     Owner:  NLM     Status:  MEDLINE    
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)
S Nakao; P C Come; M J Miller; S Momomura; P Sahagian; B J Ransil; W Grossman
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Circulation     Volume:  73     ISSN:  0009-7322     ISO Abbreviation:  Circulation     Publication Date:  1986 Mar 
Date Detail:
Created Date:  1986-04-01     Completed Date:  1986-04-01     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  579-85     Citation Subset:  AIM; IM    
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MeSH Terms
Atrial Function
Blood Pressure*
Cardiac Output*
Heart Rate
Oxygen / blood
Vena Cava, Inferior / physiology
Ventricular Function*
Grant Support
Reg. No./Substance:

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