Stenosis

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stenosis

[stə′nō·səs]
(medicine)
Constriction or narrowing, as of the heart or blood vessels.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Stenosis

 

the narrowing of a physiological opening or the lumen of a tubular organ. Examples of the former include stenosis of the left atrioventricular orifice of the heart, or mitral stenosis. Examples of the latter include stenosis of the intestine, trachea, bronchi, arteries, or pylorus of the stomach (pylorostenosis).

Stenoses may be congenital (developmental anomalies) or acquired, in which case they may be caused by a tumor or by scarring following an inflammatory process, ulcer, or trauma. Organic strictures are distinguished from functional stenoses, which result from a spasm of the musculature. Severe stenosis hampers the movement of blood, food, and air, and consequently the musculature of the organ located above the stenosis hypertrophies (compensated stenosis). Later, muscle tone decreases, the lumen of the organ above the stricture enlarges substantially, and the movement through the narrowed part becomes disrupted (decompensated stenosis).

Stenosis is treated surgically by enlarging the affected orifice, as in some cases of heart disease, by passing a bougie through the structure involved, by excising the constricted part, or by performing plastic surgery.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The severity of coronary artery stenosis was assessed by quantitative coronary angiography using Gensini scores.[13] The Gensini scores of 1, 2, 4, 8, 16, and 32 points were given for the stenosis of 1-25%, 26-50%, 51-75%, 76-90%, 91-99%, and 100% (complete occlusion).
Coronary Artery Stenosis and the Correlation with Pericardial Fat Volume
In several meta-analyses undertaken to date, a higher CACS has been associated with a greater degree of coronary artery stenosis and a higher risk of coronary heart disease [74-76].
Banerjee, "Effect of guidewire on contribution of loss due to momentum change and viscous loss to the translesional pressure drop across coronary artery stenosis: an analytical approach," BioMedical Engineering Online, vol.
FFR and Coronary Artery Stenosis. In the resting state, the local myocardial blood supply was not reduced until the severity of the coronary artery stenosis (measured in diameter) reached >80% [20].
TABLE 2: Multivariate logistic regression analysis for predictors for the presence of significant coronary artery stenosis *.
Various studies has proposed that occurrence of Met S in patients with CAD is about 72.5%6 and in Pakistani migrants 52%.7 Prevalence of CAD is about 91% in people having Met S and 62% in those without Met S.8 Significant coronary artery stenosis was present in 46.5% of patients with Met S and 26% of patients without Met S.9
In light of the systolic dysfunction not in proportion with the degree of coronary artery stenosis and the multiple areas of wall motion abnormalities seen on echocardiogram, the diagnosis of Takotsubo cardiomyopathy (TCMP) was made.
Patients with OSA should be evaluated for coronary artery stenosis (narrowing) and calcium buildup, but non-calcified plaque isn't dense enough to register on a standard calcium scoring test.
The researchers defined severe coronary artery stenosis (narrowing) as more than 70% fat build-up inside an artery.
The relationship between bisphosphonate use and the decrease in cardiovascular calcification in the 65-years-and-older group did not reach statistical significance for the prevalence of aortic valve stenosis and coronary artery stenosis, but the trends were similar.

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