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Inspiratory Muscle Training Improves Oxygen Uptake Efficiency Slope in Patients With Chronic Heart Failure.
MedLine Citation:
PMID:  19779358     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: Inspiratory muscle training (IMT) improves exercise capacity and ventilatory responses to exercise in patients with chronic heart failure (CHF) with inspiratory muscle weakness (IMW). We analyzed the effects of IMT on the oxygen uptake efficiency slope (OUES) in this patient population. METHODS: Thirty-two CHF patients with IMW (maximal inspiratory pressure [PImax] < 70% of predicted) were randomly assigned to either a 12-week program of IMT (IMT, n = 16) or placebo-IMT (P-IMT, n = 16). PImax and OUES were obtained before and after the intervention. RESULTS: Inspiratory muscle training resulted in 115% increment in PImax (5.9 +/- 0.9 vs 12.7 +/- 0.9 kPa; P < .001) and in significant improvement in OUES (1,554 +/- 617 to 2,037 +/- 747 mL min O2/L min of minute ventilation; P = .001). There were no significant changes in the P-IMT group. There was a significant association between the changes in PImax and OUES (r = 0.82, P < .01). CONCLUSION: In CHF patients with IMW, IMT results in a significant increase in OUES.
Authors:
Ricardo Stein; Gaspar R Chiappa; Henrique Güths; Pedro Dallʼago; Jorge P Ribeiro
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2009-9-22
Journal Detail:
Title:  Journal of cardiopulmonary rehabilitation and prevention     Volume:  -     ISSN:  1932-751X     ISO Abbreviation:  -     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-9-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101291247     Medline TA:  J Cardiopulm Rehabil Prev     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Exercise Pathophysiology Research Laboratory and Cardiology Division, Hospital de Clinicas de Porto Alegre (Drs Stein, Chiappa, and Ribeiro), School of Physical Therapy, UNILASALLE, Canoas (Mr Güths and Dr Dall'Ago), Department of Physiological Sciences, Fundação Faculdade Federal de Ciências Médicas de Porto Alegre, Porto Alegre (Dr Dall'Ago), and Department of Medicine, Federal University of Rio Grande do Sul, Porto Alegre (Dr Ribeiro), Brazil.
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