Pseudocolor plots of the local membrane potential illustrating plane-wave propagation through a mural slice of our 2D simulation domain with a random distribution of myocytes and fibroblasts.

<p>Here we consider the strong-coupling case and different régimes in the stability diagram of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0045040#pone-0045040-g006" target="_blank">Fig. 6</a>; (a.1)–(a.4) propagation in régime <b>R1</b> (); (b.1)–(b.4) propagation in régime <b>R2</b> (); (c.1)–(c.4) propagation in régime <b>R3</b> (); (d.1)–(d.4) propagation in régime <b>R4</b> (); (e.1)–(e.4) propagation in régime <b>R5</b> ().(For full spatiotemporal evolutions see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0045040#pone.0045040.s002" target="_blank">Video S2</a>.).