vasoconstrictor


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va·so·con·stric·tor

(vā'sō-kon-strik'tŏr, vas'ō-),
1. An agent that causes narrowing of the blood vessels. Synonym(s): vasoconstrictive (2)
2. A nerve, stimulation of which causes vascular constriction.

vasoconstrictor

(vā′zō-kən-strĭk′tər)
n.
Something, such as a nerve or drug, that causes vasoconstriction.

vasoconstrictor

A vasoactive agent that constricts blood vessels–eg, epinephrine, norepinephrine, which is produced endogenously to compensate for hypotension and maintain vascular tone in hemorrhagic and other forms of shock. Cf Vasodilator.

va·so·con·stric·tor

(vā'sō-kŏn-strik'tŏr)
1. An agent that causes narrowing of the blood vessels.
Synonym(s): vasoconstrictive (2) .
2. A nerve, stimulation of which causes vascular constriction.

va·so·con·stric·tor

(vā'sō-kŏn-strik'tŏr)
1. An agent that narrows blood vessels.
Synonym(s): vasoconstrictive (2) .
2. A nerve, stimulation of which causes vascular constriction.
References in periodicals archive ?
Sin embargo, la diferencia del efecto antiangiogenico entre la suspension de triamcinolona sin asociar a anestesicos locales comparada con las que estaban asociadas a anestesicos locales con y sin vasoconstrictor, no produjeron diferencias estadisticas significativas en el recuento total de vasos sanguineos.
Addition of a vasoconstrictor agent reduces the toxicity.
Epinephrine reinforces the effect of local anesthetics by increasing the duration and depth of analgesia3 and is regularly incorporated for infiltration in most commercial preparations because it aids in homeostasis.4,5 Epitome of vasoconstrictor decreases the systematic toxicity of L.A and after infiltration decreases the release of local anesthetics to blood circulation.6 B.P and heart rate,7 arrhythmia,8 myocardial ischemia,9,10 increase of endogenous catecholamine,10 and hypokalemia11 were raised after administration of L.A containing epinephrine noted in previous studies.
This was similar to that reported in human and rat hypertension models (Vanhoutte et al., 2005; Shi et al., 2008) where there was an endothelium dysfunction because of a lower bioavailability of NO due to the increase in oxidative stress that stimulates COX and production of prostaglandin vasoconstrictors (Vanhoutte, 2011).
It is well known that the vasoconstrictors, the triptans, are less effective and sometimes have no effect, even in patients with proven arterial pain, if the headache has been allowed to become very severe before the medication is used.
Terlipressin, a provasopressin drug exhibits direct vasoconstrictor properties: consequences on heart perfusion and performance.
Topical vasoconstrictors: Aim is to decongest the nasal cavity.
The comparison of vascular contraction between aortas from both experimental groups in the presence of inhibitors showed no major differences in the presence of NS398, although vessels from the polyphenol group had a trend for a higher contractile response (Figure 4(e)); however, in the presence of INDO, the contraction in vessels from the polyphenol group was significantly greater (Figure 4(f)), suggesting a reduced involvement of nonCOX-2-derived vasoconstrictor metabolites in aortas from Provinols-treated ZF rats.
Effects of FGR and CPR on Endogenous Vasoconstrictors. PE, 5-HT, Ang II, ET-1, P[G.sub.2[alpha]], Vaso, and Dopa are all endogenous vasoconstrictors which play key roles in maintaining vasculature tension [41].
Patients with septic shock expected to survive more than 24 hours were enrolled within 12 hours of the commencement of vasoconstrictor support.
Valsartan is an angiotensin II receptor blocker (ARB) that blocks the binding of angiotensin II to the AT1 receptor in many tissues, such as vascular smooth muscle and the adrenal gland, thereby blocking its vasoconstrictor and aldosterone-secreting effects, concluded the company.