Pulmonary valve stenosis is a condition characterized by obstruction to blood flow from the right ventricle to the pulmonary artery. This obstruction is caused by narrowing (stenosis) at one or more points from the right ventricle to the pulmonary artery. The most common form of pulmonary stenosis is obstruction at the valve itself, referred to as pulmonary valvar stenosis.
Patients with mild pulmonary valve stenosis are healthy, can participate in all types of physical activities and sporting events, and lead normal lives. The type of treatment required depends on the type of valve abnormality present. Most commonly, the pulmonary valve is of normal size, and the obstruction is due to fusion along the commissures or lines of valve leaflet opening. This "typical" form of pulmonary valve stenosis responds very nicely to balloon dilation. Balloon dilation valvuloplasty is performed at the time of cardiac catheterization and does not require open-heart surgery.
In United Kingdom, statistical analysis on pulmonary valve stenosis resulted as there was a good correlation between the two measurement methods (R(2) = 0.87). However, the echocardiographic PV measurements were smaller on average, with a significant variation in that discrepancy (mean ratio 0.941 (±0.16)). There was no significant reduction in error if extreme measurements (PV annulus z-score <-3) were excluded (P = 0.09), or if the reviewed echocardiographic measurements were used (P = 0.58).