Document Detail


Autonomic regulation after exercise evidenced by spectral analysis of heart rate variability in asthmatic children.
MedLine Citation:
PMID:  11030279     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Bronchial asthma is associated with abnormal autonomic nervous function in childhood. Exercise is one of the most common precipitating factors of acute asthmatic crises although the exact mechanism of autonomic regulation in asthmatic children after exercise is unclear. OBJECTIVE: The aim of this study was to investigate the features of autonomic regulation after exercise in asthmatic and control children. METHODS: Pulmonary function tests and heart rate variability spectral analysis were performed in 15 asthmatic children and 7 control children (age 6 to 15 years) during and after an exercise challenge. RESULTS: The maximum % fall of forced expiratory volume in 1 second (FEV1) was significantly greater (P < .01) in asthmatic subjects (9.1 +/- 5.1%) than in normal control subjects (1.0 +/- 2.5%). The high frequency band (HF) amplitude, an index of cardiac vagal tone, 5 minutes after exercise was significantly higher (P < .05) in the asthmatic subjects (14.4 +/- 7.9 msec) than in control subjects (5.9 +/- 2.6 msec). Furthermore, the difference in the HF amplitude between the control group and the exercise-induced asthma group was significant both 5 minutes (P < .01) and 10 minutes (P < .05) after challenge. There was a significant correlation (P = .565, P = .0165) between HF amplitude 5 minutes after exercise and the magnitude of the decrease in FEV1. On the other hand, no significant difference was observed in the low frequency band amplitude between the controls and the asthmatic subjects. The ratio of low frequency to high frequency power, which is suggested to correlate with cardiac sympathetic activity, did not differ between the two groups. CONCLUSION: These findings suggest that autonomic nervous activities, particularly vagal response after exercise, in asthmatic children is different from that in control children.
Authors:
H Fujii; O Fukutomi; R Inoue; S Shinoda; H Okammoto; T Teramoto; N Kondo; H Wada; K Saito; T Matsuoka; M Seishima
Related Documents :
2386059 - Influence of baseline lung function on exercise-induced response in childhood asthma.
21424279 - Strength training stops bone loss and builds muscle in postmenopausal breast cancer sur...
10955749 - Exercise-induced bronchoconstriction depends on exercise load.
1514539 - Finger injuries involving stationary exercise bicycles.
24125909 - Epidemiology of cycling for exercise, recreation or sport in australia and its contribu...
16850429 - Continuous ratings of breathlessness during exercise by children and young adults with ...
24725369 - Benefits of whole body vibration training in patients hospitalised for copd exacerbatio...
19525129 - Vascularity of the supraspinatus tendon three months after repair: characterization usi...
9008669 - Reliability of physical performance measures in nursing home residents with alzheimer's...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology     Volume:  85     ISSN:  1081-1206     ISO Abbreviation:  Ann. Allergy Asthma Immunol.     Publication Date:  2000 Sep 
Date Detail:
Created Date:  2000-10-12     Completed Date:  2000-10-26     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9503580     Medline TA:  Ann Allergy Asthma Immunol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  233-7     Citation Subset:  IM    
Affiliation:
Department of Laboratory Medicine, Gifu University School of Medicine, Japan.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adolescent
Asthma / physiopathology*
Autonomic Nervous System / physiology*
Blood Pressure / physiology
Child
Exercise
Female
Forced Expiratory Volume
Heart Rate / physiology
Humans
Male
Signal Processing, Computer-Assisted
Spectrum Analysis / methods*

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


Previous Document:  Effects of substance P and vasoactive intestinal peptide on interferon-gamma and interleukin-4 produ...
Next Document:  Cannabis (hemp) positive skin tests and respiratory symptoms.