Test Case A. (Top Left) Snapshots of the spatial distribution of the action potential from the MD and BD for a cube of tissue with fibres aligned along the x-axis (marked in red). Configurations are reported 25 ms after applying an electrical stimulus at the location of the asterisk. The grid reflects the mechanical mesh of the static configuration. (Top right) Comparison of zero isopotential surfaces obtained from the MD scenario (red surface) and BD scenario (blue surface) for different time steps (10, 25, 30 ms). In order to compare them, the different activations have been projected on the reference configuration. (Bottom) Obtained pseudo-ECGs. The three bipolar ECGs along the Cartesian axes are shown here. Green, red, and blue lines represent results for the pure-electrophysiology approach, the MD approach, and the fully coupled approach, respectively.