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• W2000473410 abstract "Atrial fibrillation (AF) is the most common arrhythmia of the heart in industrialized countries. Its generation and the transitory behavior of paroxysmal AF are still not well understood. In this work we examine the interaction of two activation sources via an isthmus as possible cause for the initiation of fibrillation episodes. For this study, the electrophysiological model of Bueno-Orovio, Cherry and Fenton is adapted to atrial electrophysiology, both for physiological and electrophysiologically remodeled conditions due to AF. We show that the interaction of the pacemakers, combined with the geometrical constraints of the isthmus, can produce fibrillatory-type irregularities, which we quantify by the loss of spatial phase coherence in the transmembrane voltage. Transitions to irregular behavior occur when the frequencies of the pacemakers exceed certain thresholds, suggesting that AF episodes are initiated by frequency changes of the activating sources (sinus node, ectopic focus)." @default.
• W2000473410 created "2016-06-24" @default.
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• W2000473410 date "2015-02-01" @default.
• W2000473410 modified "2023-10-16" @default.
• W2000473410 title "Initiation of atrial fibrillation by interaction of pacemakers with geometrical constraints" @default.
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• W2000473410 doi "https://doi.org/10.1016/j.jtbi.2014.10.030" @default.
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