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Pulmonary valve stenosis
Alternative namesValvular pulmonary stenosis; Heart valve pulmonary stenosis
DefinitionPulmonary valve stenosis is a condition, usually present at birth (congenital), in which outflow of blood from the right ventricle (lower chamber) of the heart is obstructed at the level of the pulmonic valve (the valve which separates the heart from the pulmonary artery).
Causes, incidence, and risk factors
Pulmonary valve stenosis is most often caused by a malformation during fetal development. The cause is unknown. A narrowing may occur in the pulmonary valve or below the pulmonary valve at the pulmonary artery.
The defect may occur alone, but is relatively common in connection with other heart defects. The condition can be mild or severe. It occurs in approximately 10% of patients with congenital heart disease.
Pulmonary stenosis can also occur later in life as a result of conditions that cause damage or scarring of the heart valves. These include rheumatic fever , endocarditis , and other disorders.
Note: There may be no symptoms until the disorder is severe. Symptoms, when present, may be aggravated by exercise or activity.
Signs and tests
A heart murmur may be heard by stethoscope.
In some cases, treatment may not be required.
Surgical repair of the defect ( heart valve surgery ) is usually performed when the child has reached preschool age. Oxygen may be required prior to surgery if symptoms are severe.
Medications used before surgery may include prostaglandins (PGE) to maintain pulmonary blood flow, water pills to remove the excess fluid, anti-arrhythmics to improve the heart function, and blood thinners to prevent clots.
The outcome may be poor without surgical repair. The outcome is good with successful surgery.
Calling your health care provider
Call your health care provider if symptoms associated with pulmonary valve stenosis occur.
Update Date: 4/13/2004John A. Daller, M.D., Ph.D., Department of Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT