Fig. 4.

a The 3D FE bi-ventricle mesh geometry with a pressure boundary condition applied to the left ventricle inner surface (red surface). The pressure linearly increases from 0 to 4 mmHg in a period of 0.5s. b The myofibre distribution in the ventricle wall, which rotates from epicardium to endocardium (${60}^{\mathit{o}}$ to $-{60}^o$)