Figure 5.

EGM analysis for a non-AF tissue in (A,B) and a peroxysmal-AF (PxAF) tissue with 20% uniform diffuse fibrosis (Fu) in (C,D). Top row: EGMs aligned with respect to the time correspondent to the maximum slope of the depolarization wave (marked as t = 0 in the x-axis). The vertical dashed lines delimit the time window TW for the R_i,j(t) repolarization signals. Bottom row: atrial repolarization waves, R_i,j(t), with dots indicating the maximum absolute value, $R_{i,j}^A$, of the waves within TW. The horizontal dotted lines represent the optimal threshold R^th found by Se/Sp analysis.