Figure 8.

Reentrant electrical activity in the model of rabbit RA tissue. Reentry was initiated by applying a series of rapid stimuli to a focal pacing site (same as in Fig. 7). Snapshots of the propagating wave (A–D) are shown as iso-surfaces of the membrane voltage V = −30 mV for successive moments of time. The tissue heterogeneity results in a unidirectional conduction block toward the crista terminalis (A), leading to generation of a spiral wave reentry (D). Arrows indicate directions of wave propagation.