tricuspid stenosis

stenosis /ste·no·sis/ (stĕ-no´sis) pl. steno´ses   [Gr.] stricture; an abnormal narrowing or contraction of a duct or canal.

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aortic stenosis  (AS) a narrowing of the aortic orifice of the heart or of the aorta near the valve.

hypertrophic pyloric stenosis  narrowing of the pyloric canal due to muscular hypertrophy and mucosal edema, usually in infants.

hypertrophic subaortic stenosis , idiopathic hypertrophic subaortic stenosis (IHSS) a form of hypertrophic cardiomyopathy in which the left ventricle is hypertrophied and the cavity is small; it is marked by obstruction to left ventricular outflow.

infantile hypertrophic gastric stenosis  congenital hypertrophy and hyperplasia of the musculature of the pyloric sphincter, leading to partial obstruction of the gastric outlet.

mitral stenosis  a narrowing of the left atrioventricular orifice.

pulmonary stenosis  (PS) narrowing of the opening between the pulmonary artery and the right ventricle, usually at the level of the valve leaflets.

pyloric stenosis  obstruction of the pyloric orifice of the stomach; it may be congenital or acquired.

renal artery stenosis  narrowing of one or both renal arteries, so that renal function is impaired, resulting in renal hypertension and, if stenosis is bilateral, chronic renal failure.

subaortic stenosis  aortic stenosis due to an obstructive lesion in the left ventricle below the aortic valve, causing a pressure gradient across the obstruction within the ventricle.

tricuspid stenosis  (TS) narrowing or stricture of the tricuspid orifice of the heart.

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tricuspid stenosis

n.

Pathological narrowing of the orifice of the tricuspid valve.

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tricuspid stenosis,

narrowing or stricture of the tricuspid valve. It is relatively uncommon and usually associated with lesions, caused by rheumatic fever, of other valves. Clinical characteristics include a diastolic pressure gradient between the right atrium and right ventricle, jugular vein distension, pulmonary congestion, and, in severe cases, hepatic congestion and splenomegaly.

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stenosis [stĕ-no´sis] (pl. steno´ses)

an abnormal narrowing or contraction of a body passage or opening; called also arctation, coarctation, and stricture.

aortic stenosis obstruction to the outflow of blood from the left ventricle into the aorta; in the majority of adult cases the etiology is degenerative calcific disease of the valve.

hypertrophic subaortic stenosis (idiopathic hypertrophic subaortic stenosis) a cardiomyopathy of unknown cause, in which the left ventricle is hypertrophied and the cavity is small; it is marked by obstruction to left ventricular outflow.

mitral stenosis a narrowing of the left atrioventricular orifice (mitral valve) due to inflammation and scarring; the cause is almost always rheumatic heart disease. Normally the leaflets open with each pulsation of the heart, allowing blood to flow from the left atrium into the left ventricle, and close as the ventricle fills again so that they prevent a backward flow of blood. In mitral stenosis there is a resultant increase of pressure in the pulmonary artery and hypertrophy of the left ventricle. The usual treatment is surgical replacement of the valve.

pulmonary stenosis (PS) narrowing of the opening between the pulmonary artery and the right ventricle.

pyloric stenosis see pyloric stenosis.

renal artery stenosis narrowing of one or both renal arteries by atherosclerosis or by fibrous dysplasia or hyperplasia, so that renal function is impaired (see ischemic nephropathy). Increased renin release by the affected kidney causes renovascular hypertension, and bilateral stenosis may result in chronic renal failure.

spinal stenosis narrowing of the vertebral canal, nerve root canals, or intervertebral foramina of the lumbar spine, caused by encroachment of bone upon the space; symptoms are caused by compression of the cauda equina and include pain, paresthesias, and neurogenic claudication. The condition may be either congenital or due to spinal degeneration.

subaortic stenosis aortic stenosis due to an obstructive lesion in the left ventricle below the aortic valve, causing a pressure gradient across the obstruction within the ventricle. See also idiopathic hypertrophic subaortic stenosis.

subglottic stenosis stenosis of the trachea below the glottis. A congenital form results in neonatal stridor or laryngotracheitis, often requiring tracheotomy but resolving with age. An acquired form is caused by repeated intubations.

tracheal stenosis scarring of the trachea with narrowing, usually as a result of injury from an artificial airway or trauma.

tricuspid stenosis (TS) narrowing or stricture of the tricuspid orifice of the heart, a condition often seen in patients with severe congestive heart failure, usually the result of volume overload and pulmonary hypertension with right ventricular and tricuspid annular dilation.

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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.