Document Detail


Impact of cardiac rehabilitation on the exercise function of children with serious congenital heart disease.
MedLine Citation:
PMID:  16322156     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: The exercise capacity of children with congenital heart disease (CHD) is often depressed. This depression is thought to be attributable to (1) residual hemodynamic defects and (2) deconditioning secondary to physical inactivity. We hypothesized that this latter component would be ameliorated by a formal cardiac rehabilitation program designed specifically for children. The objective of this study was to characterize the effect of a cardiac rehabilitation program on the exercise performance of children with CHD and to define the physiologic mechanisms that might account for any improvements that are observed. METHODS: Nineteen patients with CHD who were referred for exercise testing and found to have a peak oxygen consumption (VO2) and/or peak work rate <80% of predicted were enrolled in the study. Sixteen patients (11 Fontan patients, 5 with other CHD) completed the program and had postrehabilitation exercise tests, results of which were compared with the prerehabilitation studies. RESULTS: Improvements were found in 15 of 16 patients. Peak VO2 rose from 26.4 +/- 9.1 to 30.7 +/- 9.2 mL/kg per min; peak work rate from 93 +/- 32 to 106 +/- 34 W, and the ventilatory anaerobic threshold from 14.2 +/- 4.8 to 17.4 +/- 4.5 mL/kg per min. The peak heart rate and peak respiratory exchange ratio did not change, suggesting that the improvements were not attributable merely to an increased effort. In contrast, the peak oxygen pulse rose significantly, from 7.6 +/- 2.8 to 9.7 +/- 4.1 mL/beat, an improvement that can be attributed only to an increase in stroke volume and/or oxygen extraction at peak exercise. No patient experienced rehabilitation-related complications. CONCLUSION: Cardiac rehabilitation can improve the exercise performance of children with CHD. This improvement is mediated by an increase in stroke volume and/or oxygen extraction during exercise. Routine use of formal cardiac rehabilitation may greatly reduce the morbidity of complex CHD.
Authors:
Jonathan Rhodes; Tracy J Curran; Laurel Camil; Nicole Rabideau; David R Fulton; Naomi S Gauthier; Kimberlee Gauvreau; Kathy J Jenkins
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Pediatrics     Volume:  116     ISSN:  1098-4275     ISO Abbreviation:  Pediatrics     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-12-02     Completed Date:  2005-12-22     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0376422     Medline TA:  Pediatrics     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1339-45     Citation Subset:  AIM; IM    
Affiliation:
Department of Pediatric Cardiology, Children's Hospital, Boston, Massachusetts, USA. jonathan.rhodes@cardio.chboston.org
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Child
Exercise / physiology*
Exercise Test
Female
Heart Defects, Congenital / physiopathology*,  rehabilitation*,  surgery
Humans
Male
Pilot Projects
Grant Support
ID/Acronym/Agency:
5U01 HL068285/HL/NHLBI NIH HHS

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


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