Document Detail


Noninvasive ventilation with continuous positive airway pressure acutely improves 6-minute walk distance in chronic heart failure.
MedLine Citation:
PMID:  19158587     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Noninvasive ventilation with continuous positive airway pressure (CPAP) has been used in patients with chronic heart failure (CHF), although its effect on exercise tolerance in these patients is unknown. The aim of this study was to determine the effects of CPAP on exercise tolerance in outpatients with CHF. METHODS: Following a double-blind, randomized, crossover, and placebo-controlled protocol, 12 patients with CHF (8 male; 4 female; age 54 +/- 12 years; body mass index 27.3 +/- 1.8 kg/m2, New York Heart Association Class II, III) underwent CPAP via nasal mask for 30 minutes in a recumbent position. Mask pressure was 3 cm H2O for 10 minutes, followed by individual progression up to 4 to 6 cm H2O, whereas placebo was fixed 0 to 1 cm H2O. A 6-minute walk test was performed after placebo and CPAP. RESULTS: Continuous positive airway pressure decreased the resting heart rate (pre: 80 +/- 17 bpm; post: 71 +/- 15 bpm; P = .001) and mean arterial pressure (pre: 103 +/- 14 mm Hg; post: 97 +/- 13 mm Hg; P = .008). During exercise test, CPAP increased the distance covered (CPAP: 538 +/- 78 m; placebo: 479 +/- 83 m; P < .001) and the peak heart rate (CPAP: 98 +/- 17; placebo: 89 +/- 12 bpm; P = .049) but did not change the peak mean arterial pressure (P = .161). CONCLUSION: Noninvasive ventilation with CPAP increased exercise tolerance in patients with stable CHF. Future clinical trials should investigate whether this effect is associated with improved clinical outcome.
Authors:
Sérgio Chermont; Mónica M P Quintão; Evandro T Mesquita; Nazareth N Rocha; Antonio Claudio L Nóbrega
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Journal of cardiopulmonary rehabilitation and prevention     Volume:  29     ISSN:  1932-7501     ISO Abbreviation:  -     Publication Date:    2009 Jan-Feb
Date Detail:
Created Date:  2009-01-22     Completed Date:  2009-03-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101291247     Medline TA:  J Cardiopulm Rehabil Prev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  44-8     Citation Subset:  IM    
Affiliation:
Post-Graduate Program in Cardiovascular Sciences, Fluminense Federal University, Niterói, Brazil.
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MeSH Terms
Descriptor/Qualifier:
Body Mass Index
Continuous Positive Airway Pressure*
Cross-Over Studies
Double-Blind Method
Exercise Test
Exercise Tolerance*
Female
Health Services Accessibility
Heart Failure / physiopathology,  rehabilitation*
Humans
Male
Middle Aged
Oxygen Consumption
Respiratory Mechanics
Time Factors
Walking*

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


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