Figure 1.

Surfaces on which boundary conditions are applied: the endocardial surfaces ${\mathrm{\Gamma }}_{\text{n}}={\mathrm{\Gamma }}_{\text{LV}}\cup {\mathrm{\Gamma }}_{\text{RV}}\cup {\mathrm{\Gamma }}_{\text{LA}}\cup {\mathrm{\Gamma }}_{\text{RA}}$ are used for the pressure boundary condition; ${\mathrm{\Gamma }}_{\text{D}}$ is used as a zero displacement Dirichlet boundary; and ${\mathrm{\Gamma }}_{\text{P}}$ is used for the frictionless sliding contact problem. Note that the Dirichlet boundary in the right figure is clipped for visualization reasons.