Velocity Vector Imaging in the Measurement of Left Ventricular Twist Mechanics: Head-to-Head One Way Comparison Between Speckle Tracking Echocardiography and Velocity Vector Imaging

VVI is a feasible modality for assessing twist-related parameters. Although VVI agreed well with STE for most of the rotation-related parameters, poor concordance was found between the two methods for a few parameters. It is hypothesized that this discrepancy originates from the different tracking algorithms used. The findings indicate that caution should be exercised when interpreting or comparing twist-related parameters obtained using different echocardiographic devices with proprietary image analyzers.