Regensburg 2007 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Poster I

DY 24.22: Poster

Wednesday, March 28, 2007, 16:00–18:00, Poster D

Spatio-temporal dynamics of the action potential during atrial fibrillation — •Claudia Hamann, Thomas Hennig, and Philipp Maass — Institut für Physik, Technische Universität Ilmenau, 98684 Ilmenau, Germany

Under normal conditions the contraction of the heart muscles is controlled by the regular propagation of an action potential. Atrial fibrillation (AF) is a common arrhythmia with multiple reentry of the action potential and self-excitation in certain regions of the tissue, which after transduction through the atrio-ventricular node can give rise to different distributions of ventricular beat intervals [1]. On the basis of the model of FitzHugh and Nagumo we simulate the dynamics of the electrical potential in the atrium. The spatio-temporal patterns are analysed with emphasis on the conditions necessary for the occurrence of reentry and self-oscillation phenomena. Characteristic features of the propagation retrieved from the model are compared to statistical properties of the intra-atrial electrocardiogram.

[1]

C. Hamann, Th. Hennig, P. Maass, Proceedings of the "Conference of the European Study Group on Cardiovascular Oscillations 2006" (ESGCO 2006), Jena, Germany, 15-17 May 2006, p. 36.