Movie of Figure 4b

Simulation of spiral wave dynamics using Model 2, which has a longer plateau and faster repolarization than Model 1 (see text). Alternans is suppressed due to the increased coupling currents from the sharp wave back, and the induced spiral wave curls tightly and remains stable. The slight irregularities along the waves are due to the meandering of the tip trajectory and not to alternans. Excited tissue is shown in white and light gray and quiescent tissue in black. Tissue size is 17.5x17.5 cm.