Linear and non-linear analysis of atrial signals and local activation period series during atrial-fibrillation episodes

L. T. Mainardi, A. Porta, G. Calcagnini, P. Bartolini, A. Michelucci, S. Cerutti

Research output: Contribution to journalArticlepeer-review

Abstract

Linear and non-linear indexes for the characterisation of the dynamics in atrial signals (AS) and local atrial period (LAP) series are assessed in different atrial fibrillation (AF) episodes as defined by Wells. Parameters include the linear index obtained from the cross-correlation function (CCF) between ASs and the non-linear synchronisation (S) index based on the mutual corrected conditional entropy (MCCE). Regularity (R) was computed on single-lead AS. In addition, the level of predictability (LP) and the regularity of LAP series were computed. It was found that the level of synchronisation between ASs decreased passing from type-I to type-II AF when using linear (CCF: 0.90±0.10 against 0.44±0.18; p

Original languageEnglish
Pages (from-to)249-254
Number of pages6
JournalMedical and Biological Engineering and Computing
Volume39
Issue number2
Publication statusPublished - 2001

Keywords

  • Atrial signal
  • Linear predictability
  • Non-linear dynamics
  • Regularity
  • Synchronisation

ASJC Scopus subject areas

  • Biomedical Engineering
  • Health Informatics
  • Health Information Management
  • Computer Science Applications
  • Computational Theory and Mathematics

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