Figure 7.

Depolarization wave, D_i,j(t) analysis. Top row: statistical distribution of depolarization wave amplitude $D_{i,j}^A$ in fibrotic areas, non-fibrotic areas, and the whole tissue for simulated cases with non-uniform diffuse type 1 and type 2 fibrosis at 20 and 40%. Black lines represent the mean of the distribution. Bottom line: ROC curves for the same simulated cases as in the top row. Optimal thresholds minimizing the Euclidean distance to the top-left corner of the graph are shown with asterisks. Red circles correspond to the mean of the depolarization wave amplitudes. In all cases, the optimal threshold D^th is lower than the global mean.