pulmonary valve

The pulmonary valve is one of the heart's semilunar valves. It is located between the right ventricle and the pulmonary artery, controlling blood flow from the heart to the lungs. This valve typically has two leaflets, or cusps. Its primary function is to prevent the backflow of blood into the right ventricle after it has been pumped into the pulmonary artery. Pulmonary stenosis, a narrowing of this valve or the infundibulum (the funnel-shaped part of the right ventricle leading to the pulmonary artery), is usually a congenital defect. Mild cases may not cause symptoms, but severe stenosis can lead to right-sided heart failure.1234