Figure 5

Bland-Altman plots of the inter-test differences in end systolic twist angles at the ventricular base (left), mid-ventricle (middle), and apex (right). In all cases, the limits of agreement (± 2 standard deviation lines) are large compared to the mean values being measured, which translated into poor CoVs (listed at the top of each plot). Because of the small twist angles at the mid-ventricular slice, this effect is particularly pronounced (CoV = 547%).