pulmonary stenosis

▪ congenital defect
      narrowing of either the pulmonary valve—the valve through which blood flows from the right ventricle, or lower chamber, of the heart on its way to the lungs—or the infundibulum, or of both. The infundibulum (Latin: “funnel”) is the funnel-shaped portion of the right ventricle that opens into the pulmonary artery. Its narrowing is also called infundibular stenosis. Pulmonary stenosis is usually a congenital defect and may be associated with other cardiovascular congenital defects.

      Persons may have mild pulmonary stenosis without being conscious of the defect or may experience difficulty in breathing and have a tendency to faint after exertion. Characteristic heart sounds lead to the diagnosis.

      If the stenosis is severe, the right ventricle is enlarged and under abnormal pressure in the effort to maintain normal blood flow to the lungs. Failure to maintain adequate blood flow—right-sided heart failure—causes increased pressure in the peripheral veins, enlargement of the liver, cyanosis (a bluish tinge to the skin), and accumulation of fluid in the legs. The treatment for severe pulmonary stenosis is the surgical correction of the defect.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Pulmonary stenosis — The pulmonary valve is too tight so that the flow of blood from the right ventricle of the heart into the pulmonary artery is impeded. This means the right ventricle must pump harder than normal to overcome the obstruction. If the stenosis is… …   Medical dictionary

  • pulmonary stenosis — congenital narrowing of the outlet of the right ventricle of the heart to the pulmonary artery. The defect may be in the pulmonary valve (valvular stenosis) or in the outflow tract of the right ventricle below the valve (infundibular stenosis).… …   The new mediacal dictionary

  • pulmonary stenosis — noun abnormal narrowing of the opening into the pulmonary artery from the right ventricle • Hypernyms: ↑stenosis, ↑stricture • Part Holonyms: ↑tetralogy of Fallot, ↑Fallot s tetralogy, ↑Fallot s syndrome …   Useful english dictionary

  • Pulmonary stenosis, peripheral, with cholestasis — Also known as arteriohepatic dysplasia or Alagille syndrome, this ia a genetic disorder characterized by jaundice in the newborn period, liver disease with cholestasis, peripheral pulmonic stenosis and unusual face. Children with Alagille… …   Medical dictionary

  • Стеноз Легочного Ствола (Pulmonary Stenosis) — врожденное сужение отверстия, ведущего из правого желудочка сердца в легочную артерию. Данный дефект может развиться в результате наличия какого либо дефекта клапанов легочного ствола (клапанный стеноз (valvular stenosis)) или участка ниже этого… …   Медицинские термины

  • Cholestasis with peripheral pulmonary stenosis — Also known as arteriohepatic dysplasia or Alagille syndrome, this ia a genetic disorder characterized by yellowing of the skin (jaundice) in the newborn period, liver disease with cholestasis, peripheral pulmonic stenosis and unusual face.… …   Medical dictionary

  • Peripheral pulmonary stenosis with cholestasis — Also known as arteriohepatic dysplasia or Alagille syndrome, this ia a genetic disorder characterized by jaundice in the newborn period, liver disease with cholestasis, peripheral pulmonic stenosis and unusual face. Children with Alagille… …   Medical dictionary

  • Pulmonary valve stenosis — Infobox Disease Name = PAGENAME Caption = Pulmonary valve stenosis Width = 250px DiseasesDB = 11025 ICD10 = ICD10|I|37|0|i|30, ICD10|I|37|2|i|30, ICD10|Q|22|1|q|20 ICD9 = ICD9|424.3, ICD9|746.02 ICDO = OMIM = 265500 MedlinePlus = 001096… …   Wikipedia

  • Stenosis — A narrowing, as in aortic stenosis (narrowing of the aortic valve in the heart), pulmonary stenosis (narrowing of the pulmonary valve in the heart), pyloric stenosis (narrowing of the outlet of the stomach), spinal stenosis (narrowing of the… …   Medical dictionary

  • stenosis — n. the abnormal narrowing of a passage or opening, such as a blood vessel or heart valve. See: aortic stenosis, carotid artery stenosis, mitral stenosis, pulmonary stenosis, pyloric stenosis …   The new mediacal dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.