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Electrophysiological Heterogeneity of Atrial Fibrillation and Local Effect of Propafenone in the Human Right Atrium: Analysis Based on Symbolic Dynamics

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Abstract

A recently developed algorithm that is based on symbolic dynamics and computation of the normalized algorithmic complexity (Cα) was applied to basket-catheter mapping of the atrial fibrillation (AF). The aim of our study was to analyze the spatial distribution of the Cα during AF and effects of propafenone on this distribution. During right atrial mapping in 25 patients with AF 31 intra-atrial and 1 surface bipolar channels were acquired. The anatomical location of the intra-atrial electrodes was defined fluoroscopically. Cα was calculated for a moving window (size: 2000 points; step 500 points). Generated Cα was analyzed within 10 minutes before and after administration of propafenone. The inter-regional Cα distribution was analyzed using the Friedman-test (intra-individually) and Kruskall-Wallis-H-test (inter- individually). A value of p=0.05 was set for an error probability. Inter-regional Cα differences were found in all patients (p<0.001). The right atrium could be divided in high- and low complexity areas according to individual patterns. A significant Cα increase in cranio-caudal direction (with the exception of septum) was confirmed inter-individually (p<0.01). The administration of propafenone enlarged the areas of low complexity.

Conclusions: This new method utilizing the combination of symbolic dynamics and adaptive power estimation can provide complex evaluation of the dynamics of AF in man. High-density mapping will be required for further evaluation of results.

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Authors and Affiliations

  1. Dept. of Cardiology, Kerckhoff Clinic, Bad Nauheim, Germany

    Alexander Berkowitsch, Joerg Carlsson, Ali Erdogan, Joerg Neuzner & Heinz F Pitschner

Authors
  1. Alexander Berkowitsch
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  2. Joerg Carlsson
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  3. Ali Erdogan
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  4. Joerg Neuzner
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  5. Heinz F Pitschner
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Berkowitsch, A., Carlsson, J., Erdogan, A. et al. Electrophysiological Heterogeneity of Atrial Fibrillation and Local Effect of Propafenone in the Human Right Atrium: Analysis Based on Symbolic Dynamics. J Interv Card Electrophysiol 4, 383–394 (2000). https://doi.org/10.1023/A:1009846232715

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