Narrow
Narrow (Medicine)
Narrow (pronunciation: /ˈnæroʊ/) is a term often used in the field of medicine to describe a reduction in size or width of a body part or passage.
Etymology
The term 'narrow' originates from the Old English 'nearu', meaning 'constricted' or 'limited in extent'.
Medical Usage
In medical terminology, 'narrow' is used to describe a variety of conditions and observations. For example, a narrow pulse pressure refers to a small difference between the systolic and diastolic blood pressure, which can be indicative of certain heart conditions. Similarly, a narrow therapeutic index refers to a drug that has a small difference between therapeutic and toxic doses.
Narrow can also refer to the physical constriction of body passages, such as in narrow-angle glaucoma, where the angle between the iris and cornea is smaller than normal, or narrowed arteries, which can lead to conditions like atherosclerosis and heart disease.
Related Terms
- Narrowing: The process or result of becoming narrower.
- Narrow-spectrum antibiotic: An antibiotic that is effective against a limited range of bacteria.
- Narrow complex tachycardia: A type of fast heart rate that originates in the atria or the atrioventricular node.
External links
- Medical encyclopedia article on Narrow
- Wikipedia's article - Narrow
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