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Figure 5 Delta APD and Cai Transient Duration Maps and Virtual Electrode Distribution During a 300 V Monophasic Shock
(A) Effects of shock (S) on the optical recordings at the sites indicated by arrows in B. (B) Virtual anode (blue) and virtual cathode (red) during the monophasic shocks. (C) Difference (delta) map between the action potential duration (APD) of the post-shock beat (APD2) constructed by subtracting APD2 of a cathodal shock from APD2 of an anodal shock. White to red colors indicate longer APD at the virtual anode than at virtual cathode, whereas the difference is reversed at surrounding sites. Abbreviations as in Figure 1.
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