Document Detail

Analysis of extrema of heartbeat time series in exercise test.
MedLine Citation:
PMID:  18448729     Owner:  NLM     Status:  MEDLINE    
The heartbeat time series of the electrocardiogram recorded during exercise test clearly reflects the physiological control mechanism of the autonomic nervous system on heart rate. This series shows both decreasing and increasing trends and variability of the variance. We analyse the series of intervals between two consecutive extrema, i.e. the durations of accelerations or decelerations of heart rate. We compute the distribution of the length of these intervals and their mean in a model of stationary independent variables, where they are independent of the variables' distribution. We use the mean length as discriminant statistics to compare stress and recovery phases. Data analysis performed over the heartbeat series of 14 healthy subjects shows significant difference between stress and recovery.
Camillo Cammarota; Mario Curione
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-04-30
Journal Detail:
Title:  Mathematical medicine and biology : a journal of the IMA     Volume:  25     ISSN:  1477-8602     ISO Abbreviation:  Math Med Biol     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-05-22     Completed Date:  2008-07-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101182345     Medline TA:  Math Med Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  87-97     Citation Subset:  IM    
Department of Mathematics, University of Rome La Sapienza P. le A. Moro 5, 00185 Roma.
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MeSH Terms
Autonomic Nervous System / physiology*
Exercise Test*
Heart / physiology*
Heart Rate / physiology*
Models, Cardiovascular*

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

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