valvular stenosis

valvular stenosis,

a narrowing or stricture of any of the heart valves. The condition may result from a congenital defect or may be caused by disease. See also aortic stenosis, congenital cardiac anomaly, mitral valve stenosis, pulmonary stenosis.

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stenosis

narrowing or contraction of a body passage or opening. See also specific anatomical sites.

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aortic stenosis

obstruction to the outflow of blood from the left ventricle into the aorta. May be due to an anomaly of the valves (valvular), an obstruction in the ascending aorta (supravalvular), or an obstruction in the left ventricular outflow tract (subvalvular). See also aortic subvalvular stenosis, aortic valvular disease.

esophageal stenosis

a common cause of esophageal obstruction, caused commonly by esophageal trauma; congenital stenosis often associated with tracheoesophageal fistula.

left atrioventricular stenosis

see mitral stenosis (below), valvular stenosis.

mesonephric duct stenosis

occurs as stenosis of the ductus deferens or epididymis; may be associated with renal aplasia.

mitral stenosis

a narrowing of the left atrioventricular orifice. See also mitral commissurotomy.

nasopharyngeal stenosis

an acquired disorder in cats, usually following chronic upper respiratory infection, which causes upper airway obstruction with mucopurulent nasal discharge and a wheezing respiration, which is relieved with open mouth breathing.

paramesonephric duct stenosis

focal defects in the duct lead to segmental aplasia or stenosis of the uterine tube or horn.

pulmonary artery stenosis

the commonest cardiac defect in dogs; it is a narrowing of the pulmonary outflow tract and may occur in any one of a number of common sites including infundibular, valvular and subvalvular.

rectovaginal stenosis

see rectovaginal constriction.

right atrioventricular stenosis

see tricuspid stenosis (below).

subepiglottic stenosis

has the effect of reducing air flow into and out of the lungs.

tricuspid stenosis

narrowing or stricture of the tricuspid orifice of the heart.

valvular stenosis

see aortic, pulmonary, atrioventricular.

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valvular

pertaining to, affecting or of the nature of a valve.

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valvular disease

interferes with the normal rate and smoothness of blood flow through the cardiac orifices. The creation of turbulence results in the appearance of palpable thrills and audible murmurs, stenosis and insufficiency causing congestive heart failure. See also names of cardiac valves.

valvular incompetence

the valves do not close completely and when pressure is exerted on them blood leaks back through causing inefficient forward movement of the blood and turbulent flow leading to the development of cardiac murmurs.

valvular stenosis

narrowing of the lumen of the aperture through which the blood passes causing back pressure in the venous or pulmonary circuits. The clinical manifestations include cardiac murmurs and thrills and congestive heart failure. See also stenosis.