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Valentina D.A. Corino, Massimo Mantica, Federico Lombardi, Luca T. Mainardi

Assessment of spatial organization in the atria during paroxysmal atrial fibrillation and adrenergic stimulation

Keywords: adrenergic stimulation, Atrial fibrillation, endocardial recordings, non-linear analysis, synchronization

Non-linear parameters were computed to assess the extent of spatial organization in the atria in terms of coupling/synchronization between electrograms recorded in different atrial sites. Recordings of 9 patients suffering from paroxysmal atrial fibrillation were tested during four clinical experimental conditions: sinus rhythm and atrial fibrillation, both before and after isoproterenol infusion, a drug mimicking adrenergic activation. Two non-linear metrics were investigated: an index of non-linear association (NLA) and a synchronization (S) index based on the cross-conditional entropy. Results evidence the presence of reduced coupling after drug infusion in both sinus rhythm and atrial fibrillation. Moreover, passing from the NLA to the S index, the capability of the parameter to capture the subtle changes due to isoproterenol administration increased.

Biomedizinische Technik, Walter de Gruyter

Print ISSN: 0013-5585
Volume: 51, 10/2006
Pages: 260 - 263

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