Temporal inter-relationships between LV mechanics and LV chamber hemodynamics.

<p>(a) Comparisons of temporal responses of circumferential strain, torsion and composite velocity (temporally scaled to a standard heart rate). Solid line depicts the mean value, and error bars depict the ± one standard deviation values. The red vertical solid line corresponds to the time of peak circumferential strain (end-systole). A partial loop depicts (b) mean torsion versus mean circumferential strain, (c) mean circumferential strain versus mean velocity, and (d) mean torsion versus mean velocity. The red dots in (b-d) correspond to the red line in (a). Key timing events corresponding to peak aortic outflow, peak mitral inflow, peak circumferential strain and peak torsion are also indicated in the loops (c-d).