How Hyperpolarization and the Recovery of Excitability Affect Propagation through a Virtual Anode in the Heart

Figure 4

Calculated action potential speed as a function of position, for the simulations shown in Figure 3.

(a) S2 of 13x threshold at 285 ms

(b) S2 of 14x threshold at 285 ms

(c) S2 of 13x threshold at 290 ms

(d) S2 of 14x threshold at 290 ms