RV FAC
In our study, the accuracy of RV FAC was comparable with RV free wall
strain in patients with mild and moderate RV dysfunction; the AUC range
was from 0.62 to 0.69. RV FAC was superior to the 1-dimensional
parameters, S’ and TAPSE. As a well-established 2-dimensional parameter,
RV FAC has been validated in various studies and was shown to be an
independent indicator of sudden death, stroke, and heart failure. A
recent study indicated that RV FAC can accurately predict RVEF than
45%, with an AUC of 0.89. Potential limitations of RV FAC include lack
of clear guidance in selecting the optimal view for measurements of a
3-dimensional object with complex geometric shape, and RV FAC neglects
contribution of RVOT to the overall RV function.