stenosis
Pronunciation: steh-NO-sis
Abnormal narrowing of a blood vessel that restricts blood flow.
Full Definition
Stenosis refers to the pathological narrowing of an artery or other blood vessel, typically caused by atherosclerotic plaque buildup, inflammation, or structural abnormalities. The degree of stenosis is usually expressed as a percentage of luminal narrowing compared to the normal vessel diameter. Hemodynamically significant stenosis generally occurs when the vessel lumen is reduced by 70% or more in diameter. Stenosis can affect any artery but is particularly clinically significant in coronary, carotid, and renal arteries. Imaging assessment of stenosis severity is crucial for determining treatment strategies.
Usage
Usage note: Plural form is stenoses. Quantify with percentage when possible.
In Context
- "Angiography revealed 85% stenosis of the right carotid artery." — Vascular surgery report
- "The patient's symptoms were attributed to coronary stenosis in the LAD territory." — Cardiology assessment