Right Ventricular Outflow Tract Velocity Time Interval: An Invaluable Yet Forgotten Echocardiographic Variable

Even when both TAPSE and RVOT VTI, as well as PASP and PVR, convey somewhat similar information, significant anatomical and functional differences exist between these variables. These differences might explain why the RVOT VTI/PVR ratio might be more useful than TAPSE/PASP, particularly given the limitations of using TAPSE in certain clinical scenarios and the more reliable hemodynamic data provided by PVR. Regardless, additional studies are now needed to provide prospective comparisons between both ratios.