Pulmonary valve stenosis is a heart valve disorder that involves the pulmonary valve.
This valve separates the right ventricle (one of the chambers in the heart) and the pulmonary artery. The pulmonary artery carries oxygen-rich blood to the lungs.
Stenosis occurs when the valve cannot open wide enough. As a result, less blood flows to the lungs.
Narrowing in the pulmonary valve is usually present at birth (congenital). It is caused by a problem that occurs when the unborn baby (fetus) is developing. The cause is unknown, but genetics may play a role.
Narrowing that occurs in the valve itself is called pulmonary valve stenosis. There may also be narrowing just before or just after the valve.
The defect may occur alone or with other congenital heart defects. The condition can be mild or severe.
Pulmonary valve stenosis is a rare disorder.
Note: Patients with mild to moderate blockage may not have any symptoms. There may be no symptoms until the disorder is severe. Symptoms, when present, may get worse with exercise or activity.
The health care provider may hear a heart murmur when listening to your heart using a stethoscope. Murmurs are blowing, whooshing, or rasping sounds heard during a heartbeat.
Tests used to diagnose pulmonary stenosis may include:
Sometimes, treatment may not be needed if the disorder is mild.
When there are also other heart defects, medications may be used to:
Percutaneous balloon pulmonary dilation (valvuloplasty) may be used when no other heart defects are present. This surgery is done through an artery in the groin. The doctor sends a flexible tube (catheter) with a balloon attached to the end up to the heart. The balloon stretches the opening of the valve.
Some patients may need heart surgery to repair or replace the pulmonary valve. The new valve can be made from different materials.
About one-third of patients with mild stenosis get better, one-third stay the same, and one-third get worse. The outcome is good with successful surgery or balloon dilation. Other congenital heart defects may be a factor in the outlook.
Some valves can last for decades. Others wear out and will need to be replaced.
Call your health care provider if:
Valvular pulmonary stenosis; Heart valve pulmonary stenosis; Pulmonary stenosis; Stenosis - pulmonary valve; Balloon valvuloplasty - pulmonary