Pulmonic Stenosis
| Peak PV gradient | |
| Mild | 5–35 mmHg |
| Moderate | 36–64 mmHg or peak aortic flow velocity ≥ 3.0 m/s |
| Severe | >64 mmHg or peak aortic flow velocity > 4.0 m/s |
Pulmonic Regurgitation
Severe
1. Vena contracta ≥75% of the RVOT;
2. PHT < 200 ms;
3. PR jet density/RVOT Systolic Jet density ≥ 1;
4. Holodiastolic flow reversal in MPA;
