Tricuspid annulus peak systolic excursion (TAPSE)
TAPSE had similar performance as S’ in our study and was slightly more accurate than S’ in patients with severe RV dysfunction (AUCTAPSE 0.673 > AUCS’0.652). TAPSE is also readily obtainable, and has modest correlation with RVEF, 2D RV FAC and 2D RV EF although it measures the longitudinal function. TAPSE is a simple and straightforward measurement that doesn’t require optimal image quality and time-consuming image analysis. Similar to S’, TAPSE assumes that the basal and adjacent segment displacement in the four-chamber view represents the entire RV function, which may not be valid in several disease states and regional RV wall motion abnormalities. In other words, TAPSE is comparatively load- and angle dependent, can subject to cardiac translation and is the least user dependent parameter for RV function assessment.