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. 2008 Mar 1;94(5):1904–1915. doi: 10.1529/biophysj.107.121343

Figure 7.

Figure 7

(Top) Map of ΔVopt on the cut surface for a shock of 40 V/cm strength. Green (40 V/cm shock) and red (28 V/cm shock) dotted lines refer to locations where ΔVm changes sign. (Bottom) Effect of the increase in shock strength from 28 V/cm to 40 V/cm on the optical ΔVopt profile along a centrally located horizontal line (endo- to epicardium) on the cut surface of the same wedge as in Fig. 4, with permeable boundary conditions. Optical potentials are normalized as percent of normal action potential magnitude.