Quantitative standard and advanced echocardiographic parameters (with respective cut-off points) recommended in patients with suspected or ascertained AC
| Parameter |
| PLAX RVOT (mm) * |
| Abnormal if ≥ 32 |
| PLAX RVOT index (mm/m2)* |
| Abnormal if ≥ 19 |
| PSAX RVOT (mm) * |
| Abnormal if ≥ 36 |
| PSAX RVOT index (mm2) * |
| Abnormal if ≥ 21 |
| RV basal diameter (mm) |
| Abnormal if > 41 |
| RV fractional area change (%)* |
| Abnormal if ≤ 33 |
| TAPSE (mm) |
| Abnormal if < 17 |
| RV free wall longitudinal strain (%) |
| Abnormal if worse than -20 |
| RV mechanical dispersion (SD of time to peak strain) (ms) |
| Abnormal if > 25-30# |
| Three dimensional echocardiography RV EF (%) |
| Abnormal if ≤40 |
| Left ventricular global longitudinal strain (%) |
| Abnormal if worse than -18 |
*Indicate minor criteria from the TFC 2010.
# 3 segments model and 6 segments model.
Abbreviations:
EF: Ejection fraction
LV: left ventricular
PLAX RVOT: parasternal long axis right ventricular outflow tract
PSAX RVOT: parasternal short axis right ventricular outflow tract
RV: Right ventricle
TAPSE: Tricuspid annular plane systolic excursion.