What is pulmonary stenosis?

• Pulmonic valve stenosis (PS) is essentially a congenital disorder • Much less common etiologies include carcinoid and obstructing tumors or bulky vegetations. The pulmonic valve is only very rarely affected by the rheumatic process • PS is defined hemodynamically by a systolic pressure gradient between the RV and main PA. RV hypertrophy develops as a consequence of sustained obstruction to RV outf1ow, and systolic ejection is prolonged