Initiation of Rotors by Fast Propagation Regions in Excitable Media: A Theoretical Study

Xiang Gao, Alexei Krekhov, Vladimir Zykov, Eberhard Bodenschatz
2018 Frontiers in Physics  
We study the effect of geometry of a fast propagation region (FPR) in an excitable medium on the rotor initiation using a generic two-dimensional reaction-diffusion model. We find that, while the flat boundary of a rectangularly shaped FPR may block the propagation of the excitation wave, a large local curvature at the rounded corners of the FPR would prevent the blockage and thus initiate a rotor. Our simulations demonstrate that the prerequisites for the rotor initiation are the degree of the
more » ... e the degree of the heterogeneity, its shape and size. These results may explain the incidence of arrhythmias by local heterogeneities induced, for example, by a cardiac tissue remodeling.
doi:10.3389/fphy.2018.00008 fatcat:plswyx4utvatdjdugieoiei2ee