Figure 2

Relationship between ECV and Cardiac Function. (a) The relationship between ECV and the LV mass/volume ratio. With the same range of ECVs (p = 0.6 for the H-LVH group vs. the HCM group), the LV mass/volume ratio was mildly impaired in H-LVH patients (1.19–1.66 compared with 0.65–0.97 in controls, p < 0.001), but it was markedly impaired in HCM patients (1.33–2.30, p < 0.001 compared with H-LVH or controls). (b) Relationship between ECV and LVEF. A hyperdynamic LVEF was observed in HCM patients but was not observed in patients with H-LVH for correspondingly similar ranges of ECV (p = 0.004 for the HCM group vs. the control group and p = 0.7 for the H-LVH group vs. the control group). ECV: extracellular volume; H-LVH: hypertension-induced left ventricular hypertrophy; HCM: hypertrophic cardiomyopathy; LV: left ventricle; LVEF: left ventricular ejection fraction.