vasoconstriction

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Related to Vasoconstrictors: Vasodilators, epinephrine

vasoconstriction

 [vas″o-kon-strik´shun]
decrease in the caliber of blood vessels. adj., adj vasoconstric´tive.

va·so·con·stric·tion

(vā'sō-kon-strik'shŭn, vas'ō-),
Narrowing of the blood vessels.

vasoconstriction

(vā′zō-kən-strĭk′shən)
n.
Constriction of a blood vessel, as by a nerve or drug.

vas′o·con·stric′tive adj.

va·so·con·stric·tion

(vā'sō-kŏn-strik'shŭn)
Reduction in the caliber of a blood vessel due to contraction of smooth muscle fibers in the tunica media leading to decreased blood flow to a part.

vasoconstriction

Active narrowing of small arteries as a result of contraction of the circular smooth muscle fibres in their walls. This severely reduces the flow of blood through them. Compare VASODILATATION.

vasoconstriction

a narrowing of the blood vessels, often in response to cold, which occurs through a contraction of INVOLUNTARY muscles in the walls of the vessels brought about by a stimulus from the sympathetic nervous system (see AUTONOMIC NERVOUS SYSTEM).

Vasoconstriction

Constriction of a blood vessel.
Mentioned in: Induction of Labor

va·so·con·stric·tion

(vā'sō-kŏn-strik'shŭn)
Narrowing of blood vessels.
References in periodicals archive ?
However, when vessels were blocked by IND ([10.sup.-5] M), the high sensitivity ACh-mediated vasoconstriction that was previously described, was practically abolished in all the vessels studied, suggesting a coupling mechanism between activation of muscarinic receptors with the production of vasoconstrictor prostanoids mediated by COX fish to turtle (Miller and Vanhoutte 1986, 2000) and in C.
Commonly used vasoconstrictors are cocaine and phenylephrine.
Those endogenous vasoconstrictors regulate vascular tone via their respective receptors (mostly G protein-coupled) in smooth muscle.
In survivors, sVCAM-1 levels decreased at day 1 and decreased to within a normal range within 7 days of stopping vasoconstrictors. This demonstrates that there was less cellular damage and recovery in endothelial functions, as septic shock resolved.
Combination of splanchnic vasoconstrictor along with intravenous albumin for volume expansion is treatment of choice for HRS as per Acute Dialysis Quality Initiative (ADQI) work group recommendations.8 It results in improved renal perfusion with normalization of sympathetic over-activity as well as of angiotensinogen II levels.
This study revealed the novel finding that the vasoconstrictor responses elicited by AII but not AVP or 5-HT were markedly reduced in OAs from 2K-1C rats.
Jones also notes that some of the medications used to treat migraines, specifically the potent vasoconstrictors, such as almotriptan (Axert) and sumatriptan (Imitrex), actually cause blood vessels in the heart to constrict and can cause chest pain and, rarely, heart attacks.
(Of note, both epinephrine and oxymetazoline are excellent vasoconstrictors, but phenylephrine should be used with caution.
* Certain medications, such as betablockers and angiotensin-converting enzyme (ACE) inhibitors used for hypertension, antihistamines, certain antibiotics, some cholesterol-lowering drugs, certain antifungal medications, and vasoconstrictors in nasal sprays
To improve texture, she recommended retinoids and alpha hydroxy acids; to improve hydration, include humectants and occlusive agents; and to correct dyschromia, a formulation should contain melanogenesis inhibitors, retinoids, L-ascorbic acid, vasoconstrictors and anti-inflammatory agents.