Fig. 3

Left ventricle (LV) longitudinal (apical-basal) hemodynamic forces (HDFs) in a normal athlete. Left top. Time profile of the apical-basal LV HDFs. The main intracardiac events during individual time intervals are indicated, together with markers of end-diastole (ED) and end-systole (ES). Left bottom. LV volume curve. Right. Intensity-weighted polar histogram, showing the distribution and intensity of the LV HDFs during the entire heartbeat as red isosceles triangles. HDFs are directed longitudinally (apex-base direction). ECG: electrocardiogram