Document Detail


Hemodynamic differences between supine and upright exercise in patients with congestive heart failure.
MedLine Citation:
PMID:  7116598     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Although the differences in hemodynamic responses to supine and upright exercise have been studied in normal subjects and in patients with angina pectoris, no such comparison has been made in patients with congestive heart failure. Many investigators measure exercise hemodynamics in heart failure patients to assess the effect of vasodilator and inotropic drugs. Both modes of exercise have been used and have often yielded differing results. We compared the hemodynamic response to supine and upright exercise in 14 patients with stable, New York Heart Association class III chronic heart failure. During upright exercise, peak heart rate was higher (124 +/- 15 vs 115 +/- 18 beats/min, p less than 0.025) and peak mean arterial pressure was lower (102 +/- 15 vs 95 +/- 17 mm Hg, p less than 0.25), yielding similar double products. Although the peak left ventricular filling pressure was slightly lower during upright exercise (40 +/- 7 vs 35 +/- 10 mm Hg, p less than 0.05), the maximum cardiac and stroke indexes were not significantly different (3.6 +/- 0.8 vs 3.4 +/- 0.8 l/min/m2 and 30 +/- 8 vs 30 +/- 6 ml/m2, upright vs supine exercise). In contrast to these relatively similar hemodynamic responses, exercise capacity was significantly greater during upright exercise (peak work load 336 +/- 84 vs 293 +/- 73 kpm/min, p less than 0.1; maximum oxygen consumption 12.1 +/- 2.4 vs 9.8 +/- 1.9 ml/min/kg, p less than 0.001). We conclude that either exercise method may be used to assess the hemodynamic effects of drugs, but that exercise capacity should be measured in the upright position.
Authors:
B Kramer; B Massie; N Topic
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Circulation     Volume:  66     ISSN:  0009-7322     ISO Abbreviation:  Circulation     Publication Date:  1982 Oct 
Date Detail:
Created Date:  1982-12-03     Completed Date:  1982-12-03     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  820-5     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Aged
Blood Pressure
Cardiac Output
Exercise Test / methods
Heart Failure / diagnosis*,  physiopathology
Heart Rate
Hemodynamics*
Humans
Male
Middle Aged
Oxygen Consumption
Stroke Volume
Vascular Resistance

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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