• RV systolic function has been evaluated using multiple parameters and their cutoffs are listed below:
  • RIMP (Right ventricular index of myocardial performance)
    RIMP > 0.43 by PWDoppler and > 0.54 by DTI indicate RV dysfunction
  • TAPSE (Tricuspid annular plane systolic excursion)
    TAPSE < 17 mm is highly suggestive of RV systolic dysfunction
  • S' (by Doppler Tissue Imaging)
    An S' velocity < 9.5 cm/sec measured on the free-wall side indicates RV systolic dysfunction
  • 2D FAC (Fractional area change)
    2D RV FAC <35% indicates RV systolic dysfunction
  • 3D EF (Ejection fraction)
    RV EF of <45% usually reflects abnormal RV systolic function
  • Longitudinal strain and strain rate by DTI and 2D STE
    Global longitudinal RV free wall strain > -20% (i.e., <20% in absolute value) is likely abnormal