vasodilation


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vasodilation

 [vas″o-di-la´shun]
1. increase in the caliber of blood vessels.
2. a state of increased caliber of blood vessels. Extreme, abnormal vasodilation is called angiectasis. adj., adj vasodi´lative.

va·so·di·la·tion

(vā'sō-dī-lā'shŭn, vas-ō-),
Widening of the lumen of blood vessels.
Synonym(s): vasodilatation

vasodilation

(vā′zō-dī-lā′shən, -dĭ-) also

vasodilatation

(-dĭl′ə-tā′shən, -dī′lə-)
n.
Dilation of a blood vessel, as by the action of a nerve or drug.

va·so·di·la·tion

(vā'sō-dī-lā'shŭn)
Increase in the caliber of a blood vessel due to relaxation of smooth muscle fibers in the tunica media. This increases blood flow but decreases systemic vascular resistance.
Synonym(s): vasodilatation.

vasodilation

See VASODILATATION.

vasodilation

the expansion of blood vessels by relocation of muscles mainly controlled by the sympathetic nervous system (see AUTONOMIC NERVOUS SYSTEM).

Vasodilation

The increase in the internal diameter of a blood vessel that results from relaxation of smooth muscle within the wall of the vessel thus causing an increase in blood flow.

va·so·di·la·tion

(vā'sō-dī-lā'shŭn)
Widening of the lumen of blood vessels.
References in periodicals archive ?
In the present study, we showed that compound 48/80 induced dural mast cell degranulation leads to vasodilation of middle meningeal artery and its anterior and posterior branches.
The main findings of this study are as follows: i) overall endothelial-dependent penile microvascular vasodilation decreased in hypertensive patients compared with normotensive age-matched control subjects; ii) acute SIL administration significantly increased penile microvascular vasodilation in both normotensive and hypertensive individuals; iii) control subjects experienced greater maximum increases in penile microvascular conductance induced by acetylcholine iontophoresis after SIL administration than hypertensive patients, and iv) SIL increased systemic endothelial-dependent microvascular vasodilation in hypertensive patients, but not normotensive subjects.
This case report illustrates a rare case of symptomatic claudication, most likely due to reduced arterial vasodilation, most likely due to a reduced sensitivity for nitric oxide.
that retinal vasodilation is associated with increased retinal blood flow [29] and that dark adaptation increases retinal volumetric blood flow in healthy subjects by 62-71% [8].
Flow-mediated vasodilation as a predictor of therapeutic response to midodrine hydrochloride in children with postural orthostatic tachycardia syndrome.
A study [10] evaluated endothelium-dependent vasodilation (%FAD) and endothelium-independent vasodilation (%GTN) after insulin therapy.
Effect of RA on [H.sub.2][O.sub.2]-Induced Endothelium-Dependent Vasodilation Impairments in Rat Aortic Rings.
Most of the published data so far suggest that the activation of adenosine receptors [A.sub.2A]AR and [A.sub.2B]AR mediates vasodilation in various vessels [14, 15, 72-75], whereas the activation of [A.sub.1]AR and [A.sub.3]AR causes vasoconstriction [55, 56].
Propofol also has vasodilating effect on coronary arteries through this same Ca+ channel blocking properties.19 So propofol induced vasodilation during rewarming phase of cardiopulmonary bypass can ensure proper rewarming.
After four weeks of treatment, patients' vasodilation in pulmonary arteries will be measured by high resolution CT scanning (HRCT), concluded the company.
Flow-mediated vasodilation (an evaluation of endothelial function), blood pressure, and arterial stiffness were measured before intake and at one, two, four, six, and eight hours post-consumption.