Page 83 - Assessing right ventricular function and the pulmonary circulation in pulmonary hypertension Onno Anthonius Spruijt
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and fractional transverse wall motion (r2=0.296), TAPSE (r2=0.235) and fractional longitudinal wall motion (r2=0.184) (figure 2).
Figure 2: Relation between CMRI-derived-RVEF and echo parameters. RVEF = Right Ventricle Ejection Fraction; RVFAC = Right ventricular fractional area change; TAPSE = tricuspid annular plane systolic excursion; FLWM = fractional longitudinal wall motion. FTWM = fractional transverse wall motion.
As depicted in figure 3, RVFAC (AUC=0.90) was superior in detecting a RVEF<35% compared to TAPSE (AUC=0.80), FLWM (AUC=0.82) and FTWM (AUC=0.81). Comparison of AUCs of the different parameters showed a trend towards significance in favour of the AUC of RVFAC compared to the AUCs of TAPSE (p=0.069), FLMW (p=0.095) and FTWM (p=0.054).
Intra- and interobserver variability of all four echo-parameters are depicted in table 3 and figure A and B in the online supplement. Intraobserver variability and interobserver variability were best for TAPSE (ICC=0.97 and ICC=0.92).
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