| Severity |
RV: LV pressure |
Gradient across the pulmonary valve |
| Mild |
< ½ |
<35 to 40 mmHg |
| Moderate |
½< RVP< ¾ |
>40 mmHg |
| Severe |
≥ 3/4 |
>60 to 70 mmHg |
The degree of severity of pulmonary valve stenosis has been defined by the ratio of
the right ventricular pressure to the left ventricular pressure (RV:LV pressure), we
well as the peak systolic gradient across the pulmonary valve |