Stenosis of pulmonary artery
Encyclopedia
Stenosis of pulmonary artery is a condition where the pulmonary artery
Pulmonary artery
The pulmonary arteries carry deoxygenated blood from the heart to the lungs. They are the only arteries that carry deoxygenated blood....

 is subject to an abnormal constriction (or stenosis
Stenosis
A stenosis is an abnormal narrowing in a blood vessel or other tubular organ or structure.It is also sometimes called a stricture ....

).

It should not be confused with a pulmonary valve stenosis
Pulmonary valve stenosis
Pulmonary valve stenosis is a heart valve disorder in which outflow of blood from the right ventricle of the heart is obstructed at the level of the pulmonic valve. This results in the reduction of flow of blood to the lungs. Valvular pulmonic stenosis accounts for 80% of right ventricular outflow...

, which is in the heart
Heart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...

, but can have similar hemodynamic effects. Both stenosis of the pulmonary artery and pulmonary valve stenosis are causes of pulmonic stenosis
Pulmonic stenosis
Pulmonic stenosis, also known as Pulmonary stenosis, is a dynamic or fixed obstruction to flow from the right ventricle of the heart to the pulmonary artery. It is usually first diagnosed in childhood....

.

In some cases it is treated with surgery.
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