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DY: Fachverband Dynamik und Statistische Physik

DY 30: Reaction-Diffusion Systems

DY 30.4: Talk

Thursday, March 17, 2011, 11:00–11:15, ZEU 118

Reentries generated by a random heterogeneous region in cardiac tissue — •Sergio Alonso and Markus Bär — Physikalisch-Technische Bundesanstalt

Wave propagation in the heart has a discrete nature due to the discrete intercellular connections via gap junctions. Cardiac diseases may result on the reduction of conductivities of the gap junctions. The distribution of the disrupted connections can be inhomogeneous and some part of the heart can accumulate a major density.

We study the effect on homogeneous wave propagation with a region where a random distribution of connectivities between cells are eliminated. This region can produce the appearance of reentries. We consider the Fenton-Karma model for cardiac tissue to perform a systematic study of the reentry generation depending on the topology of the connectivity network.