stenosis /ste·no·sis/ (stĕ-no´sis) pl. steno´ses [Gr.] stricture; an abnormal narrowing or contraction of a duct or canal.
subaortic stenosis
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.
sub·a·or·tic stenosis (s b  -ôr t k)n. Narrowing of the outflow tract of the left ventricle caused by an obstruction shortly below the aortic valve. |
subaortic stenosis
Etymology: L, sub, beneath; Gk, aerein, to raise, stenos, narrow, osis, condition
a narrowing of the left ventricle outflow tract below the aortic valve. Also called aortic valvular stenosis.
subaortic, subaortal
below the aorta.
subaortic septal defect
ventricular septal defect in the pars membranaceae of, and high up in, the septum.
subaortic stenosis
see aortic subvalvular stenosis.
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