ABSTRACT
Definition As with the aortic valve, pulmonic stenosis (PS) may be considered more broadly as right ventricular (RV) outflow track obstruction with supravalvular, valvular, and subvalvular forms. It is commonly graded on the basis of peak pressure gradient: (i) trivial (<25 mmHg, 3.3 kPa); (ii) mild (25-49 mmHg, 3.3-6.5 kPa); (iii) moderate (50-79 mmHg, 6.7 kPa); and (iv) severe (≥80 mmHg, 10.7 kPa).
