Figure 1

Schematic diagram for calculating torsional hysteresis--the area within the systolic and diastolic arm of the normalized torsion volume (TV) curves (A), normalized TV curves for the two groups (B) and calculated torsional hysteresis (C). Torsion hysteresis is greater in the HTN vs. Control. *, P<0.001 vs. Control; Data points are expressed as mean±standard error.