Document Detail


Relationship between heart rate and minute ventilation, tidal volume and respiratory rate during brief and low level exercise.
MedLine Citation:
PMID:  2463559     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The correlation between heart rate (HR) and three respiratory parameters, minute ventilation (VE), tidal volume (Vt), and respiratory rate (RR), were studied. Four healthy subjects performed four exercise tests (duration 30 seconds at 50, 100, 150, or 200 W), in random order. Cardio-respiratory parameters were recorded respiratory cycle by respiratory cycle. The results of these low level exercise tests showed that oxygen consumption (VO2) was strongly correlated with VE (r = 0.91 +/- 0.10; P less than 0.01) (except in one test) and Vt (r = 0.91 +/- 0.07; P less than 0.001) (except in one test). There was no significant correlation between VO2 and RR. At exercise onset HR, VE, and Vt were modified in a matter of a few heart beats while RR varied depending on the subject and the level of exercise. During exercise average HR, VE, and Vt were significantly higher than at rest in most cases; but RR was not significantly changed by exercise. The correlations between HR and VE, Vt and RR varied from one individual to another. Nevertheless, the correlation coefficients were positive for VE and Vt, while they were negative for RR. Sensing respiratory rate thus appears to be insufficient for responsive pacing at exercise onset, but sensing respiratory volumes (Vt, VE) should give satisfactory results.
Authors:
F Vai; J L Bonnet; P Ritter; G Pioger
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  11     ISSN:  0147-8389     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  1988 Nov 
Date Detail:
Created Date:  1989-02-23     Completed Date:  1989-02-23     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1860-5     Citation Subset:  IM; S    
Affiliation:
Clinique d'Alleray, Paris, France.
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MeSH Terms
Descriptor/Qualifier:
Adult
Cardiac Pacing, Artificial / methods
Exercise Test
Heart Rate*
Humans
Male
Oxygen Consumption
Physical Exertion*
Reference Values
Respiration*
Time Factors

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


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