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

/vaso·con·stric·tion/ (-kon-strik´shun) decrease in the caliber of blood vessels.vasoconstric´tive

vasoconstriction

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

vas′o·con·stric′tive adj.

vasoconstriction

Etymology: L, vas + constrigere, to tighten
a decrease in the diameter of a blood vessel. It plays an important role in the control of blood pressure and the distribution of blood throughout the body. Vasoconstriction is triggered by stimulation of the vasomotor constriction center in the medulla. Impulses from this center travel along sympathetic nerve fibers and cause contraction of the smooth muscle layers of arteries, arterioles, and, to a lesser extent, venules, and veins, bringing about constriction of these vessels. Vasoconstriction is also induced by vasomotor pressure reflexes, chemical reflexes, the medullary ischemic reflex, and impulses from the cerebral cortex and the hypothalamus. Compare vasodilation. vasoconstrictive, 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

vasoconstriction

narrowing of the lumen of a blood vessel, due to contraction of the smooth muscle in its wall, mediated by neural (autonomic) control, local or blood-borne chemical factors, or fall in temperature. Part of the rationale for the use of ice in acute injury to minimize blood flow (and therefore swelling) in the damaged tissue.

vasoconstriction (vāˈ·zō·kn·strikˑ·shn),

n state of constriction or narrowing of a blood vessel.

va·so·con·stric·tion

(vā'sō-kŏn-strik'shŭn)
Narrowing of blood vessels.

vasoconstriction

decrease in the caliber of blood vessels; may be general or local, e.g. pulmonary, peripheral.
References in periodicals archive ?
These include maintenance of cellular antioxidant capacity, ACE inhibitory activity, and preservation of vascular responses to endothelium dependent and independent agents while decreasing responses to vasoconstrictor ones.
The amount of phentolamine mesylate delivered equals the amount of vasoconstrictor containing local anesthesia delivered during the appointment.
To determine which water-soluble metal components of UPs may be responsible for the activation of ERK1/2 and p38 MAPK, we tested the vasoconstrictor effects of soluble metals contained in UPs.
Therefore, the alterations in plasma ET-1 secretion induced by nicotine consumption might contribute to the pathogenesis of several cardiovascular disorders, in view of the powerful vasoconstrictor and growth-promoting properties of the peptide.
The LMA([R]) MADomizer([R])is a simple, effective delivery system for topical anesthetics, vasoconstrictors and other nasal or oral medications.
However, other volume expanders as well as vasoconstrictors have been considered as potential alternatives," said Mauro Bernardi, M.
Local anesthetic use is routine and remarkably safe, but in patients with uncontrolled or poorly controlled diabetes, the systemic effects of vasoconstrictors must be taken into consideration.
Sulphites used to stabilise vasoconstrictors and methylparaben, a bacteriostatic agent similar to an ester linkage found in some LAs, can cause non-IgE-mediated allergic reactions.
The active ingredients in these sprays are typically topical vasoconstrictors.