| Specific findings | |
|---|---|
| Mean pressure gradient | ≥5 mmHg |
| Inflow time–velocity integral | >60 cm |
| T1/2 | ≥190 ms |
| Valve area by continuity equation* | ≤1 cm2 |
| Supportive findings | |
| Enlarged right atrium ≥moderate | |
| Dilated inferior vena cava | |
*Stroke volume derived from left or right ventricular outflow. In the presence of more than mild TR, the derived valve area will be underestimated. Nevertheless, a value ≤1 cm2 implies a significant haemodynamic burden imposed by the combined lesion.