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Among others, RV fractional area change (RV-FAC), tricuspid annular plane systolic excursion (TAPSE), and systolic tissue Doppler velocity of the tricuspid annulus (S′) are clinically useful methods that are performed with transthoracic echocardiography (TTE).3) TTEderived RV-FAC can be systematically incorporated into the basic echocardiography exam, as it correlates well with ejection fraction measured by 3D TTE and magnetic resonance imaging.4)5) However, tracing the RV endocardial surface can be challenging in the presence of trabeculations or suboptimal image quality. Alternatively, TAPSE is movement of the lateral annulus of the tricuspid valve toward the apex, and it represents RV contractility in the long axis.6) TAPSE is usually assessed by TTE with M-mode from the apical window, and it is less dependent on optimal image quality and is simple to perform.6) Finally, S′ uses both spectral pulsed wave tissue Doppler and color tissue Doppler as an index of RV function.

Assessment of Right Ventricular Systolic Function: Conventional Methods and Modified Tricuspid Annular Plane Systolic Excursion