(a.) Causing dilation or relaxation of the blood vessels; as, the vasodilator nerves, stimulation of which causes dilation of the blood vessels to which they go. These nerves are also called vaso-inhibitory, and vasohypotonic nerves, since their stimulation causes relaxation and rest.
Example Sentences:
(1) With aging, the blood vessel wall becomes hyperreactive--presumably because of an augmented vasoconstrictor and a reduced vasodilator responsiveness.
(2) The effects of H1 and H2 antihistamines on a variety of physiological vasodilator responses were examined.
(3) In some animals, the response was marked vasodilation, whereas in others transient vasoconstriction preceded the vasodilation.
(4) Substance P, a potent vasodilating peptide, seems to be released from trigeminal nerve endings in response to nervous stimulation and is involved in the transmission of painful stimuli within the periphery.
(5) However, in the combined presence of an alpha 2-adrenoceptor antagonist (yohimbine) and prazosin, PNS caused a marked neurogenic vasodilation even when the neuronal release of NE was left intact.
(6) At present, ACE inhibitors are preferred because they are usually better tolerated than conventional vasodilators and are clinically more effective.
(7) The vasodilator effect of both calcium antagonists was responsible for side effects, of which the most common were flushing, edema, headache, and palpitations.
(8) The coronary vasodilator adenosine can be formed in the heart by breakdown of AMP or S-adenosylhomocysteine (SAdoHcy).
(9) All patients were unsuccessful by treated with antiaggregants, vasodilators and haemorheological medicaments.
(10) The relaxations in response to a nonreceptor-mediated endothelium-dependent vasodilator, A23187, and an endothelium-independent vasodilator, sodium nitroprusside, were not different between normal and diabetic aortas.
(11) For a subgroup of eight patients with postoperative MPAP greater than 30 mm Hg (at pH 7.35 to 7.40), pulmonary vascular resistance index (PVRI) also significantly increased (p less than 0.05) as PaCO2 was increased, implying a direct pulmonary vasodilating effect of alkalosis.
(12) From these results, it is concluded that (1) isolated rat common carotid arteries have both H1- and H2-receptors, (2) there are few vasoconstrictory H1-receptors, (3) both H1- and H2-receptors mediate only vasodilation but not vasoconstriction, and (4) EDRF from the endothelium might participate in histamine-induced vasodilation via not only H1- but also H2-receptors.
(13) M & B 22948, a guanosine 3',5'-cyclic monophosphate (cGMP)-selective phosphodiesterase inhibitor, enhanced the vasodilation or relaxation to the peroxide in both preparations.
(14) From these experiments it is concluded that vascular A1 and A2 adenosine receptors are present in the kidney and that activation of A1 receptors is associated with preglomerular vasoconstriction only, whereas activation of A2 receptors mediates pre- and postglomerular vasodilation with a lack of vasodilatory response of the distal afferent arteriole.
(15) Consistent with these observations, L-NMMA treatment significantly attenuated Ach-induced vasodilation in 4th-order arterioles, but it had no effect on 2nd-order arterioles.
(16) The higher degree of tachycardia in conscious dogs provoked by clenbuterol is a result of a reflex reaction to the vasodilation analogous to that of salbutamol.
(17) The reasons for this are not well understood but such factors as differing mechanisms of action, development of tolerance and unique patterns of regional redistribution of blood flow may all play a modifying role in differentiating one vasodilator from another.
(18) Vasodilation with PN 200-110 can improve cardiac performance acutely in patients with CHF.
(19) Vasodilation was not altered significantly by removal of endothelium or by pretreatment with propranolol or indometacin.
(20) Both vasoconstrictive and vasodilative phases were seen.
Vessel
Definition:
(n.) A hollow or concave utensil for holding anything; a hollow receptacle of any kind, as a hogshead, a barrel, a firkin, a bottle, a kettle, a cup, a bowl, etc.
(n.) A general name for any hollow structure made to float upon the water for purposes of navigation; especially, one that is larger than a common rowboat; as, a war vessel; a passenger vessel.
(n.) Fig.: A person regarded as receiving or containing something; esp. (Script.), one into whom something is conceived as poured, or in whom something is stored for use; as, vessels of wrath or mercy.
(n.) Any tube or canal in which the blood or other fluids are contained, secreted, or circulated, as the arteries, veins, lymphatics, etc.
(n.) A continuous tube formed from superposed large cylindrical or prismatic cells (tracheae), which have lost their intervening partitions, and are usually marked with dots, pits, rings, or spirals by internal deposition of secondary membranes; a duct.
(v. t.) To put into a vessel.
Example Sentences:
(1) Arterial compliance of great vessels can be studied through the Doppler evaluation of pulsed wave velocity along the arterial tree.
(2) With aging, the blood vessel wall becomes hyperreactive--presumably because of an augmented vasoconstrictor and a reduced vasodilator responsiveness.
(3) Multiple overlapping thin 3D slab acquisition is presented as a magnitude contrast (time of flight) technique which combines advantages from multiple thin slice 2D and direct 3D volume acquisitions to obtain high-resolution cross-sectional images of vessel detail.
(4) In the course of the syndrome development blood vessel permeability was increased in the anterior chamber of the eye.
(5) Aside from these characteristic findings of HCC, it was important to reveal the following features for the diagnosis of well differentiated type of small HCC: variable thickening or distortion of trabecular structure in association with nuclear crowding, acinar formation, selective cytoplasmic accumulation of Mallory bodies, nuclear abnormalities consisting of thickening of nucleolus, hepatic cords in close contact with bile ducts or blood vessels, and hepatocytes growing in a fibrous environment.
(6) Two fully matured specimens were collected from the blood vessel of two fish, Theragra chalcogramma, which was bought at the Emun market of Seoul in May, 1985.
(7) Its pathogenesis, still incompletely elucidated, involves the precipitation of immune complexes in the walls of the all vessels.
(8) In one of the cirrhotic patients, postmortem correlation of sonographic, angiographic, and pathological findings showed that the dilated vessels seen on sonography were cystic veins draining normally into the portal vein rather than portosystemic anastomoses.
(9) The observed pulmonary hypertension is probably the result of the left heart insufficiency and is being discussed with regard of the histopathological alterations in the heart muscle and the pulmonary vessels.
(10) DNA synthesis by endothelium subsequently increased and within 48 hr new blood vessel formation was detected.
(11) There was immediate resolution of paresthesia following mobilization of the impinging vessel from the nerve.
(12) After examining the cases reported in literature (Sacks, Barabas, Beighton Sykes), they point out that, contrary to what is generally believed, the syndrome is not rare and cases, sporadic or familial, of recurrent episodes of spontaneous rupture of the intestine and large vessels or peripheral arteries are frequent.
(13) The relationship between pressure at the functional site of origin of intracranial collateral channels (Pstem) and systemic pressure allows an estimation of the size of vascular channels from which collateral vessels originate.
(14) The release of possible peptide hormones into the interpeduncular cistern, where a pool of cerebrospinal fluid and large blood vessels occur, cannot be excluded.
(15) It is suggested that intra-endothelial conduction of electrical signals from capillaries to the resistance vessels may be involved in the local regulation of blood flow in the intact heart.
(16) Type C-like particles were found inter- and intracellularly in gland and vessel lumina and scattered in the connective tissue.
(17) We have characterized the effects of adenosine, the A1-receptor agonist N6-(L-2-phenylisopropyl)-adenosine (PIA) and the A2-receptor agonist 5'-(N-ethyl)-carboxamido-adenosine (NECA), in isolated human pulmonary vessels.
(18) It appears that the viscosity of the arterial wall must be the major source of attenuation in the larger arteries, while the viscosity of the blood plays a significant role only in the smaller vessels.
(19) In the choroid, VIP-immunoreactive fibers were seen mainly in close association with the choroidal blood vessels.
(20) Resistance vessels play a predominant role in limiting systemic arterial pressure in the orthostatic position.