Influence of diastolic fibre orientation on the left ventricular power generation.

A mathematical model is described which in a simplified way, without directly taking into account the elastic properties of the heart wall, describes the EDV which corresponds to the experimental data. The model further describes the power generation of the left ventricle at high EDV. The volume density of power is expressed with a product of three factors (1) average density of the CE, (2) a factor which contains the inotropic properties of a single CE and (3) a form factor, which involves structural changes in the heart wall at various EDV.