Pulmonary valve stenosis is a heart condition that affects the pulmonary valve, which can not open wide enough due to narrowing. As a result, less deoxygenated blood flows from right ventricle to the pulmonary artery and to the lungs. While the most common cause of pulmonary valve stenosis is congenital heart disease, it may also be due to rheumatic heart disease or a malignant carcinoid tumor. Both stenosis of the pulmonary artery and pulmonary valve stenosis are causes of pulmonic stenosis. Pulmonary valve stenosis accounts for 80% of right ventricular outflow tract obstruction.
Narrowing that occurs in the pulmonary valve is called pulmonary valve stenosis, but narrowing that occurs below the pulmonary valve is called subvalvar pulmonary stenosis. Another form of the condition, supravalvar pulmonary stenosis, is when narrowing occurs above the main pulmonary valve. The symptoms of pulmonary valve stenosis include: cyanosis, abdominal distention, fatigue, chest pain, fainting, shortness of breath, etc.