RV Function 1
This station covers the evaluation of RV function. We will lo0k at visual evaluation, RV dimensions and RV Fractional Area Change (FAC%)
A. RV Dimensions (Basic)
- Obtain the Apical 4 Chamber RV Focused View
- 3 Dimensions are measured in this view, and end-diastole, from inner edge to inner edge.
- RVD1 & RVD2 are measured parallel to the tricuspid valve annulus
- RVD1 = Basal RV Diameter
- RVD2 = Mid Cavity RV Diameter
- RVD3 = RV Longitudinal Dimension
Normal Range:
- RVD1 < 41mm
- RVD2 < 35mm
- RVD4 < 83mm
B. RV Dimensions (Advanced)
- The proximal RVOT diemnsion is measured in the PLAX view
- RVOT1 & RVOT2 are measured in the PSAX view at the aortic valve level
- RV end diastolic area (RVEDA) & RV end systolic area (RVESA) are measured in the apical 4 chamber RV focused view in end diastole and end systole respectively.
C. RV Fractional Area Change (RV FAC%)
RV FAC%:
- Obtain the Apical 4C RV Focused View
- Measure RV end-diastolic and and end-systolic areas
- RV FAC% = RVeda – RVesa / RVeda x 100
- RV FAC% > 35% is normal
