Are first ventilatory threshold and 6-minute walk test heart rate interchangeable? A pilot study in healthy elderlies and cardiac patients

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Serval ID
serval:BIB_2E52A99199AF
Type
Article: article from journal or magazin.
Collection
Publications
Title
Are first ventilatory threshold and 6-minute walk test heart rate interchangeable? A pilot study in healthy elderlies and cardiac patients
Journal
Ann Phys Rehabil Med
Author(s)
Morard M. D., Bosquet L., Laroche D., Joussain C., Besson D., Deley G., Casillas J. M., Gremeaux V.
ISSN
1877-0665 (Electronic)
ISSN-L
1877-0657
Publication state
Published
Issued date
04/2015
Volume
58
Number
2
Pages
92-7
Language
english
Notes
Morard, M D
Bosquet, L
Laroche, D
Joussain, C
Besson, D
Deley, G
Casillas, J M
Gremeaux, V
eng
Netherlands
Ann Phys Rehabil Med. 2015 Apr;58(2):92-7. doi: 10.1016/j.rehab.2014.07.001. Epub 2014 Dec 26.
Abstract
BACKGROUND: Heart rate (HR) at the ventilatory threshold (VT) is often used to prescribe exercise intensity in cardiac rehabilitation. Some studies have reported no significant difference between HR at VT and HR measured at the end of a 6-min walk test (6-MWT) in cardiac patients. The aim of this work was to assess the potential equivalence between those parameters at the individual level. METHOD: Three groups of subjects performed a stress test and a 6-MWT: 22 healthy elderlies (GES, 77 +/- 3.7 years), 10 stable coronary artery disease (CAD) patients (GMI, 50.9 +/- 4.2 years) and 30 patients with chronic heart failure (GHF, 63.3 +/- 10 years). We analyzed the correlation, mean bias, 95% confidence interval (95% CI) of the mean bias and the magnitude of the bias between 6-MWT-HR and VT-HR. RESULTS: There was a significant difference between 6-MWT and VT-HR in GHF (99.1 +/- 8.8 vs 91.6 +/- 18.6 bpm, P=0.016) but not in GES and GMI. The correlation between those 2 parameters was high for GMI (r=0.78, P<0.05), and moderate for GES and GHF (r=0.48 and 0.55, respectively, P<0.05). The 95% CI of bias was large (>30%) in GES and GHF and acceptable in GMI (8-12%). CONCLUSION: 6-MWT-HR and VT-HR do not appear interchangeable at the individual level in healthy elderlies and CHF patients. In CAD patients, further larger studies and/or the development of other walk tests could help in confirming the interest of a training prescription based on walking performance, after an exhaustive study of their cardiometabolic requirements.
Keywords
Aged, Coronary Artery Disease/*physiopathology, Exercise Tolerance/physiology, Female, Healthy Volunteers, Heart Failure/*physiopathology, Heart Rate/*physiology, Humans, Male, Middle Aged, Oxygen Consumption/physiology, Pilot Projects, *Pulmonary Ventilation, Time Factors, Walk Test/*statistics & numerical data
Pubmed
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26/11/2019 11:35
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04/05/2020 6:06
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