Figure  3: Sprouting of a broken excitation wavefront for the standard guinea-pig ventricular model. The solid line corresponds to the V = -10mV isoline and the dashed one to the tip trajectory (intersection of V = -10mV and f = 0.5 isolines). In the first plot the cut excitation-wave is shown. This was obtained by stimulating at the bottom of the medium and after the wavefront propagated for awhile setting 3/4 of the left side of the medium to the resting state. Snapshots are shown every 5 ms (left to right starting from top left). The medium size is 20 mm×60 mm.