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Figure 6a. Graphs show correlation of E-peaks (the second electrical field peak identified at the interface between inner and outer compartments of varied electrical conductivity) to tissue temperatures during RF ablation. (a) For this comparison of E-peak to temperatures at a fixed 2 cm from the electrode, there is divergence of the slopes of the linear correlation. (b) For this comparison of E-peak to the 50°C isotherm, the slopes converge. This difference can be attributed to the complex heating patterns generated during RF ablation in a system that has two or more compartments of varied electrical conductivity (Fig 5). S = siemen, 
(I) = inner conductivity.
