Fig. 6.

Mean and variance in APD₉₀ from tissue simulations incorporating extrinsic variability. (A) The mean of the APD₉₀ is calculated over all nodes in the central 0.5 cm of the tissue at each beat and plotted for both the deterministic simulations (left) and stochastic simulations (right) for each beat. (B) The variance in the APD₉₀ for both the stochastic simulations (solid lines) and deterministic simulations (dashed lines) for each beat. (C) The maximum difference in APD between the stochastic and deterministic simulations at each beat, for each simulation. Values of D are 1.171 cm² s⁻¹ (red), D=0.586 cm² s⁻¹ (green), D= 0.117 cm² s⁻¹ (blue), and D= 0.059 cm² s⁻¹ (black). (For interpretation of the references to colour in this figure caption, the reader is referred to the web version of this paper.)