Three-dimensional schematic representation of the three major components contributing to total pump function of the systemic RV: (i) longitudinal shortening along the long-axis (red) contributing to RV longitudinal ejection fraction component, (ii) inward (radial) motion of the RV free wall (orange) contributing to radial ejection fraction component, and (iii) short-axis shortening in the anteroposterior direction in parallel with the septum (purple) contributing to antero-posterior ejection fraction component. Green mesh represents systemic RV end-diastolic volume, the blue surface—the systemic RV end-systolic volume. LV, left ventricle; RV, right ventricle.