Synchronization analysis of heart period variability signal based on corrected conditional entropy

A. Porta, G. Baselli, S. Guzzetti, R. Magatelli, N. Montano, C. Cogliati, A. Malliani, S. Cerutti

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Regularity and synchronization between different rhythms mainly at low (LF) and high frequency (HF) is evaluated in heart rate variability through conditional entropy (CE). CE quantifies the degree of information left after regular patterns have been removed. In short (about 300 points) data sequences CE is evaluated with a correction which considers as random the patterns that appear only one time and would otherwise be considered as regular. The minimum of the corrected CE (CCE) with increasing pattern length is chosen as most reliable CE estimate. Beat-to-beat heart period series were analyzed in 8 normal subjects at rest (R), head up tilt (T) and controlled respiration (CR). A significant decrease in CCE was found in T (0.9±0.052) compared to R (1.01±0.037); during CR, CCE displayed a slight and not significant increase (1.07±0.055). The enhanced LF activity present in T seems to have a greater regularizing power than the periodical input provided by CR at HF.

Original languageEnglish
Title of host publicationComputers in Cardiology
PublisherIEEE Comp Soc
Pages121-124
Number of pages4
Publication statusPublished - 1997
EventProceedings of the 1997 24th Annual Meeting on Computers in Cardiology - Lund, Sweden
Duration: Sep 7 1997Sep 10 1997

Other

OtherProceedings of the 1997 24th Annual Meeting on Computers in Cardiology
CityLund, Sweden
Period9/7/979/10/97

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ASJC Scopus subject areas

  • Software
  • Cardiology and Cardiovascular Medicine

Cite this

Porta, A., Baselli, G., Guzzetti, S., Magatelli, R., Montano, N., Cogliati, C., Malliani, A., & Cerutti, S. (1997). Synchronization analysis of heart period variability signal based on corrected conditional entropy. In Computers in Cardiology (pp. 121-124). IEEE Comp Soc.