| Cardiorespiratory adaptations during the six-minute walk test in chronic heart failure patients. | |
| | |
MedLine Citation:
|
PMID: 15187823 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
BACKGROUND: The six-minute walk test (6-MWT) is widely used to assess exercise tolerance in chronic heart failure patients (CHF). The aim of this study was to analyse cardiorespiratory parameters kinetics during the 6-MWT in CHF and in healthy subjects. METHODS: A treadmill, symptom-limited exercise test and a 6-MWT were performed by 14 CHF under optimal drug treatment (CHFD), 17 CHF with cardiac resynchronization (CHFP), and 12 healthy subjects. Cardiorespiratory responses were assessed by a validated portable system. RESULTS: All subjects exceeded their ventilatory threshold during the 6-MWT. Healthy subjects and CHF performed the 6-MWT around 75 and 90% of peak oxygen uptake (V'O2) respectively (P<0.001). In CHF, a steady state was observed only for walking speed and V'O2, with a slight delay in comparison with healthy subjects, for whom a steady state was also observed for carbon dioxide production and ventilation (V'E). During the 6-MWT, the V'E adaptation was due mainly to an increase in tidal volume (VT) in CHFD, whereas in CHFP, it was due to a similar increase in VT and breathing frequency (f). In these patients, the 6-MWT VT/f slope was lower than in CHFD (P<0.01). CONCLUSIONS: During the 6-MWT, the V'O2 steady state is slightly delayed in CHF, which could be related partly to their higher exercise intensity. Moreover, each CHF group is characterized by a specific ventilation components response during the 6-MWT. |
| | |
Authors:
|
Gaëlle Kervio; Nathalie S Ville; Christophe Leclercq; Jean-Claude Daubert; François Carre |
Related Documents
:
|
17347033 - Response of the oxygen uptake efficiency slope to exercise training in patients with ch... 11023943 - Chronic exercise reduces sympathetic nerve activity in rabbits with pacing-induced hear... 10839223 - The effects of wet suits on physiological and biomechanical indices during swimming. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: European journal of cardiovascular prevention and rehabilitation : official journal of the European Society of Cardiology, Working Groups on Epidemiology & Prevention and Cardiac Rehabilitation and Exercise Physiology Volume: 11 ISSN: 1741-8267 ISO Abbreviation: Eur J Cardiovasc Prev Rehabil Publication Date: 2004 Apr |
Date Detail:
|
Created Date: 2004-06-09 Completed Date: 2004-09-28 Revised Date: 2007-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 101192000 Medline TA: Eur J Cardiovasc Prev Rehabil Country: England |
Other Details:
|
Languages: eng Pagination: 171-7 Citation Subset: IM |
Affiliation:
|
Groupe de Recherche Cardiovasculaire, Université de Rennes, France. gaelle.kervio@club-internet.fr |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adaptation, Physiological
/
physiology* Aged Carbon Dioxide / metabolism Cardiovascular System / physiopathology* Exercise Test Female Heart Failure / physiopathology* Heart Rate Humans Kinetics Male Middle Aged Oxygen Consumption Pulmonary Ventilation Respiratory System / physiopathology* Tidal Volume Time Factors Walking / physiology* |
| Chemical | |
Reg. No./Substance:
|
124-38-9/Carbon Dioxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Effect of exercise training in patients with heart failure: a pilot study on autonomic balance asses...
Next Document: Trauma system development in North America.