Document Detail

Breathing frequency bias in fractal analysis of heart rate variability.
MedLine Citation:
PMID:  19559748     Owner:  NLM     Status:  MEDLINE    
Detrended Fluctuation Analysis (DFA) is an algorithm widely used to determine fractal long-range correlations in physiological signals. Its application to heart rate variability (HRV) has proven useful in distinguishing healthy subjects from patients with cardiovascular disease. In this study we examined the effect of respiratory sinus arrhythmia (RSA) on the performance of DFA applied to HRV. Predictions based on a mathematical model were compared with those obtained from a sample of 14 normal subjects at three breathing frequencies: 0.1Hz, 0.2Hz and 0.25Hz. Results revealed that: (1) the periodical properties of RSA produce a change of the correlation exponent in HRV at a scale corresponding to the respiratory period, (2) the short-term DFA exponent is significantly reduced when breathing frequency rises from 0.1Hz to 0.2Hz. These findings raise important methodological questions regarding the application of fractal measures to short-term HRV.
Pandelis Perakakis; Michael Taylor; Eduardo Martinez-Nieto; Ioanna Revithi; Jaime Vila
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-06-25
Journal Detail:
Title:  Biological psychology     Volume:  82     ISSN:  1873-6246     ISO Abbreviation:  Biol Psychol     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-07-21     Completed Date:  2009-10-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375566     Medline TA:  Biol Psychol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  82-8     Citation Subset:  IM    
Department of Personality, University of Granada, Spain.
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MeSH Terms
Arrhythmia, Sinus / physiopathology
Bias (Epidemiology)*
Electrocardiography / methods
Heart Rate / physiology*
Respiratory Mechanics / physiology
Young Adult

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