Reproducibility and Inter-Vendor Variability of Left Ventricular Deformation Measurements by Three-Dimensional Speckle-Tracking Echocardiography

Three-dimensional STE-derived LV deformation parameters are highly vendor dependent, and the discordance levels are beyond intrinsic measurement variability of any of the tested combinations of imaging equipment and analysis software. This intervendor discordance must be taken into account when interpreting 3D deformation data.