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

Figure 6

The voltage 𝑉 (blue) and the sodium channel inactivation gates ℎ (red) and 𝑗 (green) as functions of position 𝑥, for the times indicated at the top of each frame (in ms). The S2 stimulus is applied at 𝑡₂=300 ms and has a strength of (a) 10, (b) 20, and (c) 30 times threshold.

(a)

(b)

(c)