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DY: Fachverband Dynamik und Statistische Physik
DY 15: Reaction Diffusion Systems
DY 15.2: Vortrag
Mittwoch, 24. März 2010, 10:15–10:30, H46
Effects of discrete cell coupling on propagation of scroll waves in three-dimensional excitable media — •Sergio Alonso1, Markus Bär1, and Alexander V. Panfilov2 — 1Physikalisch-Technische Bundesanstalt, Berlin, Germany — 2Utrecht University, Utrecht, The Netherlands
Wave propagation in the heart has a discrete nature due to the discrete intercellular connections via gap junctions. Although effects of discreteness on wave propagation has been studied for traveling waves and 2D vortices, its possible effects on 3D vortices (scroll waves) are largely unexplored. We study the effect of discrete cell coupling on wave propagation in a generic model of excitable medium and show that reduced cell coupling decreases the excitability of the waves in excitable lattices giving rise to negative line tension of scroll waves.