Pulmonary Valve Stenosis is a condition that affects blood flow from the heart to the lungs. Generally, blood is pumped from the heart, through the pulmonary valve, and into the lungs. People with pulmonary valve stenosis have a deformity on or near the valve, which inhibits proper blood flow. This condition typically develops before birth, although it can arise in adults as a complication of another disease (carcinoid syndrome, rheumatic fever, Noonan’s syndrome). Symptoms range from mild to severe, depending on the case, and may include: shortness of breath, chest pain, fainting, fatigue, and heart palpitations (feeling fast or odd heart beats in your chest). Pulmonary valve stenosis is often diagnosed during childhood when your doctor detects a heart murmur during a routine checkup. This condition may also be detected or confirmed using an electrocardiogram, imaging tests (x-ray or CT scan), or a procedure called a cardiac catheterization. This procedure can sometimes be used to treat this condition. In some cases, however, surgery is required to repair the pulmonary artery.