Figure 1.

Two examples of simplifying the actual physical situation during RF cardiac ablation. (a) The axial symmetry allows a three-dimensional problem to be reduced to a two-dimensional problem in a theoretical model that includes an active electrode placed perpendicular to a fragment of cardiac tissue [52]. (b) The region under study has two symmetry planes, hence only one quadrant of the whole model can be considered for computational analysis in a theoretical model including fragments of different tissues [50,51,53]. Fig. 2 shows the only quadrant considered in the model.