Discrimination of atrial rhythms by linear and non-linear methods

Luca T. Mainardi, Alberto Porta, Giovanni Calcagnini, Federica Censi, Pietro Bartolini, Antonio Michelucci, Sergio Cerutti

Research output: Contribution to journalArticlepeer-review


The discrimination among atrial rhythms is obtained through the analysis of linear and non-linear dynamics of atria electrograms and local atrial period (LAP) series. Linear and non-linear degree of coupling between atrial electrograms have been assessed using cross-correlation (CCI) and synchronization indexes. Dynamics of LAP series were investigated using level of predictability (LP) and regularity indexes. Atrial fibrillation (AF) episodes, classified according to Wells' criteria, were investigated. We found that metrics obtained from LAP series provide the best performance in the classification of AF rhythms. The LP index misclassified only 12 AF episodes over 87. Synchronization index was the most performing metric in the discrimination between organized and not-organized fibrillation: detection of organized rhythm; sensitivity (SE) > 95%; positive predictability (+P) > 95%. LP (SE: 89%; +P: 89%) and CCI (SE: 87%; +P: 83%) provide slightly lower performances.

Original languageEnglish
Pages (from-to)335-340
Number of pages6
JournalAnnali dell'Istituto Superiore di Sanita
Issue number3
Publication statusPublished - 2001


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

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


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