Figure 3.

Anatomical reentry. The black circular region in (a,b) represents a non-excitable tissue that serves as an anatomical obstacle around which cardiac excitation rotates perpetually. The top row represents the deterministic reaction–diffusion (RD) model and the bottom row represents the probabilistic cellular automata (CA) model. (a) Representative snapshot of an electrical wave from electronic supplementary material, videos S5 (top) and S6 (bottom). (b) Entropy of each cell in the cardiac tissue shows a heat map of the entropy in bits over the cell lattice. (c) Mutual information between two cells in the cardiac tissue shows a heat map of mutual information in bits over the cell lattice. Mutual information was computed between a specific cell (green circle) and all the other cells in the same cardiac tissue. (d) Profile of entropy (blue line) through the cell lattice along the vertical broken line shown in 4b. The profile of mutual information (red line) in 4d is from 4c1, left upper quadrant.