Overview and Facts about Pulmonic Stenosis

Pulmonic stenosis, or pulmonary stenosis, is a heart defect present at birth and usually diagnosed in children. The pulmonary valve usually has three leaflets that work like a one-way door, allowing blood to flow forward into the pulmonary artery and not backward into the right ventricle. In pulmonic stenosis, an issue with the pulmonary valve leads to difficulty in regulating blood flow.

There are four different types of pulmonic stenosis:

  • Valvar pulmonary stenosis: The valve leaflets are narrow and/or thickened.
  • Supravalvar pulmonary stenosis: The area above the pulmonary artery is narrow.
  • Subvalvar pulmonary stenosis: The muscle under the valve is thick and narrow, obstructing the outflow tract from the right ventricle.
  • Branch peripheral pulmonic stenosis: The right, the left or both pulmonary arteries are narrow.

Heart

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