Pseudocolor plots of the transmembrane potential of the myocyte at time, s, when a square MF-composite inhomogeneity, with and , is placed with its lower-left corner at ; the square has a side of length (a) , i.e., no inhomogeneity, (b) , (c) , (d) , (e) , (f) , (g) , and (h) .

<p><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0072950#pone.0072950.s009" target="_blank">Video S8</a> illustrates the spatiotemporal evolution of these spiral waves for (a), (d), (f) and (h). The smallest MF-composite inhomogeneity that can anchor a spiral wave has ; (i) shows a plot of the rotation period of such an anchored spiral wave.