Document Detail


Elderly Cardiac Rehabilitation Patients Show Greater Improvements in Ventilation at Submaximal Levels of Exercise.
MedLine Citation:
PMID:  11416383     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The minute ventilation (VE) and carbon dioxide output (VCO&sub2;) adaptations to 12 weeks of cardiac rehabilitation were investigated in diagnosis-matched elderly patients (ELD) and younger patients (YNG). Thirty ELD (25 males, 5 females; age equals 69.2Â+/-3.9 years) and 30 YNG (27 males, 3 females; age equals 48.3Â+/-7.0 years) were exercise tested at program entry (T1) and completion (T2). Peak oxygen uptake (VO&sub2; peak) and ventilatory threshold (VT) (ml kg-1 min-1) were greater for YNG at both T1 and T2 (p is less than 0.01). Both ELD and YNG showed significant T1 to T2 improvements (p is less than 0.01) for VO&sub2; peak (21.1% and 23.4%) and VT (20.1% and 12.4%). The VE/VCO&sub2; ratio was greater (p is less than 0.01) for ELD but approached YNG values after training. The VCO&sub2;/VO&sub2; slope showed a greater T1 to T2 reduction in ELD (12.4% vs 3.4%). There was no relationship (r(2) equals 0.15; NS) between the percentage change in VO&sub2; peak and VE/VCO&sub2; indicating unrelated mechanisms of improvement. We conclude that ELD showed similar improvements in VO&sub2; peak but greater improvements in their ventilatory tolerance for submaximal exercise. These changes indicate improvements in aging-enhanced exercise ventilation, are important for performance of normal activities of daily living, and would have been undetectable without gas exchange analysis.
Authors:
Timothy R. McConnell; Charles A. Laubach
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Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  The American journal of geriatric cardiology     Volume:  5     ISSN:  1751-715X     ISO Abbreviation:  Am J Geriatr Cardiol     Publication Date:  1996 Jul 
Date Detail:
Created Date:  2001-Jun-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9215283     Medline TA:  Am J Geriatr Cardiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  15-23     Citation Subset:  -    
Affiliation:
Geisinger Medical Center, Danville, PA.
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