The computation of atrial fibrillation chaos characteristics based on wavelet analysis

  • Jianrong Hou*
  • , Hui Zhao
  • , Dan Huang
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Atrial fibrillation data series show the non-linear and chaos characters in the process of time-space kinetics evolution. In the case of unknowing the fractal dimension of atrial fibrillation chaos, the process of querying the similarity of diagnosis curve figure will be affected to a certain degree. An evaluation formula of varying-time Hurst index is established by wavelet and the algorithm of varying-time index is presented, which is applied to extract the characteristics of the atrial fibrillation in this paper. The diagnosis of atrial fibrillation curve figure can be done at some resolution ratio level. The results show that the time-varying fractal dimension rises when atrial fibrillation begins, while it falls when atrial fibrillation ends. The begin and the end characteristics of atrial fibrillation can be successfully detected by means of the change of the time-varying fractal dimension. The results also indicate that the complexity of heart rate variability (HRV) decreases at the beginning of atrial fibrillation. The effectiveness of the method is validated by means of the HRV example in the end.

Original languageEnglish
Title of host publicationAdvanced Intelligent Computing Theories and Applications
Subtitle of host publicationWith Aspects of Theoretical and Methodological Issues - Third International Conference on Intelligent Computing, ICIC 2007, Proceedings
PublisherSpringer Verlag
Pages803-809
Number of pages7
ISBN (Print)9783540741701
DOIs
StatePublished - 2007
Event3rd International Conference on Intelligent Computing, ICIC 2007 - Qingdao, China
Duration: 21 Aug 200724 Aug 2007

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4681 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference3rd International Conference on Intelligent Computing, ICIC 2007
Country/TerritoryChina
CityQingdao
Period21/08/0724/08/07

Keywords

  • Atrial fibrillation
  • Chaos
  • Wavelet analysis

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