Table 4 Echocardiographic parameters and values to assess RV function
Variable | Imaging type | Calculation | Thresholds associated with clinical events in specific populations |
|---|---|---|---|
RVEF | CMR 3D TTE/TEE | (RVEDV-RVESV)/RVEDV | Abnormal < 44% |
FAC | 2D TTE/TEE | (RVEDA-RVESA)/RVEDA | Abnormal < 35% |
TAPSE | M-Mode | Maximal TA displacement | Abnormal < 16 mm |
S' | TDI | Maximal systolic velocity of tricuspid annulus | Abnormal ≤ 9.6 cm/s |
RVMPI | PWD TDI | (TCOT-RVET)/RVET | PWD RVMPI abnormal > 0.40 TDI RVMPI abnormal > 0.55 |
PASP | CWD | PASP = 4 * TRVmax2 | Abnormal > 36 mmHg |
mPAP | CWD | mPAP = (0.61 × PASP) + 2 mPAP = 4 x (PRVmax v)2 + RAP mPAP = 90—(0.62 × RVOT AT) mPAP = TR jet VTI + RAP | Abnormal > 25 mmHg |
TAPSE/PASP | M-Mode CWD | Maximal TA displacement/4 * TRVmax2 | Abnormal < 0.36 mm/mmHg |
RV basal dimension | 2D TTE/TEE | Maximal dimension at TA in focused RV view | Abnormal > 41 mm Abnormal > 21 mm2/m2 |
RVEDA | 2D TTE/TEE | End-diastolic RV endocardial border area tracing | Abnormal men > 126 mm2/m2 Abnormal women > 115 mm2/m2 |
RVEDV | CMR 3D TTE/TEE | End-diastolic RV endocardial border volume tracing | Abnormal men > 87 ml/m2 Abnormal women > 74 ml/m2 |
Strain | 2D TTE/TEE 3D TTE/TEE | Speckle-tracking strain imaging on RV | Abnormal RVFLS ≤  − 19% Abnormal RVGLS ≤  − 17% |