Pulmonic stenosis, also known as Pulmonary stenosis, is a dynamic or fixed obstruction to flow from the right ventricle

Right ventricle

The right ventricle is one of four chambers in the human heart. It receives deoxygenated blood from the right atrium via the tricuspid valve, and pumps it into the pulmonary artery via the pulmonary valve and pulmonary trunk....

 of the heart to 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....

. It is usually first diagnosed in childhood.
Pulmonic stenosis is usually due to isolated valvular obstruction (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...

), but may be due to subvalvular or supravalvular (Stenosis of pulmonary artery

Stenosis of pulmonary artery

Stenosis of pulmonary artery is a condition where the pulmonary artery is subject to an abnormal constriction .It should not be confused with a pulmonary valve stenosis, which is in the heart, but can have similar hemodynamic effects...

) obstruction. It may occur in association with more complicated congenital heart disorders.