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Topic: Vasoconstriction


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  Vasoconstriction, Norepinephrine, and Fibromyalgia
This vasoconstriction obviously prevents the conduction of heat from the internal portions of the body to the skin.
Abnormal microcirculation and temperature in skin above tender points in patients with fibromyalgia, showed that vasoconstriction occurs in the skin above tender points in FM patients, supporting the hypothesis that FM is related to local hypoxia in the skin above tender points.
This is contrary to one goal of vasoconstriction in the tissue, which is to conserve heat in the body.
www.xmission.com /~total/temple/Soapbox/Articles/norepin.html   (1289 words)

  
 Acute hypoxia and pulmonary vasoconstriction in humans: uncovering the mechanism of the pressor response -- Fishman 287 ...
vasoconstriction was taken by Euler and Liljestrand (6, 10).
by endothelin as the mediator of hypoxic pulmonary vasoconstriction
Divergent roles of glycolysis and the mitochondrial electron transport chain in hypoxic pulmonary vasoconstriction of the rat: identity of the hypoxic sensor.
ajplung.physiology.org /cgi/content/full/287/5/L893   (1020 words)

  
 Moderate exercise increases postexercise thresholds for vasoconstriction and shivering -- Kenny et al. 85 (4): 1357 -- ...
The threshold for vasoconstriction was defined as the point at which fingertip blood flow reached a minimum (14).
We conclude that a residual exercise-related factor(s) increases the postexercise vasoconstriction and shivering thresholds.
The threshold for thermoregulatory vasoconstriction during nitrous oxide/isoflurane anesthesia is lower in elderly than young patients.
jap.physiology.org /cgi/content/full/85/4/1357   (2612 words)

  
 Shear-induced modulation of vasoconstriction in the hepatic artery and portal vein by nitric oxide -- Macedo and Lautt ...
vasoconstriction, an increase in shear stress occurs (16).
Modulation by the endothelium of sympathetic vasoconstriction in an in vitro preparation of the rat tail artery.
Attenuation of vasoconstriction by endogenous nitric oxide in the rat tail artery.
ajpgi.physiology.org /cgi/content/full/274/2/G253   (4299 words)

  
 Attenuation of Neurogenic Vasoconstriction by Nitric Oxide in Hindlimb Microvascular Beds of the Rat In Vivo -- ...
Vasoconstriction during 1-Hz stimulation was almost identical before and after L-NAME, whereas vasoconstriction to LST stimulation with 10 Hz was clearly more pronounced after L-NAME.
Vasoconstriction was significantly enhanced after L-NAME at stimulation frequencies of 1 to 5 Hz.
Attenuation of vasoconstriction by endogenous nitric oxide in rat caudal artery.
hyper.ahajournals.org /cgi/content/full/30/4/957   (3116 words)

  
 Pulsed dye laser irradiation can reverse and prevent surgical and pharmacologic vasoconstriction.   (Site not responding. Last check: 2007-10-21)
Group I: LI was delivered to vessels with surgically induced vasoconstriction increasing vessel diameter from 0.65±0.32 mm to 1.65±0.23 mm (p<0.01).
After dilation with LI, the vessel was resistant to vasoconstriction by a topical phenylephrine (0.05mg/ml) bath (decreased in diameter from 1.65±0.23mm to 1.63±0.24 mm compared to control vessels decreasing from 1.25 ±0.23 mm to.032±0.18 mm p<0.001).
Thus, preexisting vasoconstriction must be present for laser-induced arterial paresis to occur.
omlc.ogi.edu /pubs/abs/schwengel92.html   (305 words)

  
 Effects of Mitochondrial Inhibitors and Uncouplers on Hypoxic Vasoconstriction in Rabbit Lungs -- Weissmann et al. 29 ...
induced a transient vasoconstriction at 170 and 350 nM, with
Pulmonary artery NADPH-oxidase is activated in hypoxic pulmonary vasoconstriction.
Evidence for a role of protein kinase C in hypoxic pulmonary vasoconstriction.
ajrcmb.atsjournals.org /cgi/content/full/29/6/721   (5270 words)

  
 Tumescent Liposuction - Carolina Laser in Winston Salem, North Carolina
When very dilute tumescent epinephrine is used, the wide spread vasoconstriction slows the rate of epinephrine absorption, which in turn prevents an increase in heart rate.
Profound vasoconstriction (shrinkage of capillary blood vessels) results from the tumescent infiltration of a large volume of dilute epinephrine into subcutaneous fat.
Tumescent vasoconstriction is so complete that liposuction can be done with virtually no blood loss.
www.carolinalaser.com /Tumescent_lipo.htm   (1145 words)

  
 Conducted vasoconstriction in rat mesenteric arterioles: role for dihydropyridine-insensitive Ca2+ channels -- ...
Arteriolar vasoconstriction was induced by local current stimulation as described by Steinhausen et al.
After recovery of the vessel, vasoconstriction was induced again, and the response 1,000 µm upstream from the pipette was recorded.
Angiotensin II modulates conducted vasoconstriction to norepinephrine and local electrical stimulation in rat mesenteric arterioles.
ajpheart.physiology.org /cgi/content/full/280/2/H582   (5153 words)

  
 Effects of active vasoconstriction and total flow on perfusion distribution in the rabbit lung -- Oyamada et al. 273 ...
Effects of active vasoconstriction and total flow on perfusion distribution in the rabbit lung -- Oyamada et al.
Effects of active vasoconstriction and total flow on perfusion distribution in the rabbit lung
vasoconstriction induced by alveolar hypoxia and pulmonary artery hypoxia
ajpregu.physiology.org /cgi/content/abstract/273/4/R1465   (350 words)

  
 CHEST: Pulmonary vasoconstriction, oxygen sensing, and the role of ion channels: Thomas A. Neff Lecture - Thomas L. ...   (Site not responding. Last check: 2007-10-21)
The presence of an element of vasoconstriction can be deduced from the acute vasodilatation achieved in a minority of primary pulmonary hypertension patients by calcium channel blockers, nitric oxide, prostacyclin, or adenosine.
It is thought that, at an early stage of the disease, vasoconstriction may be the principal abnormality.
Hypoxic pulmonary vasoconstriction can be demonstrated in isolated pulmonary vascular smooth muscle cells[4] and consequently, the single smooth muscle cell is a simple model of pulmonary vasoconstriction that has been studied extensively.
www.findarticles.com /p/articles/mi_m0984/is_n1_v114/ai_21023605   (849 words)

  
 PERSISTENT PULMONARY HYPERTENSION OF THE NEWBORN   (Site not responding. Last check: 2007-10-21)
Because of the high pulmonary vascular resistance, blood is diverted away from the lungs through the foramen ovale and the patent ductus arteriosus into the low resistance systemic and placental circuit.
Abnormal responsiveness of the pulmonary vasculature to hypoxia with an inability to relax after the stimulus for vasoconstriction is removed, i.e.
This is especially important when pulmonary parenchymal disease exists, as improvement in alveolar oxygenation will often result in a normal relaxation of the pulmonary arteries and improved pulmonary blood flow.
neonatal.peds.washington.edu /NICU-WEB/pphn.stm   (3559 words)

  
 Afferent arteriolar adenosine A2a receptors are coupled to KATP in in vitro perfused hydronephrotic rat kidney -- Tang ...
A: tracings of the high-affinity vasodilatory response to adenosine observed during pressure-induced (myogenic) afferent arteriolar vasoconstriction.
Interactions of adenosine A1 receptor-mediated renal vasoconstriction with endogenous nitric oxide and ANG II.
Mechanism of adenosine receptor induced renal vasoconstriction in the rat.
ajprenal.physiology.org /cgi/content/full/277/6/F926   (3281 words)

  
 ATP-sensitive Potassium Channels Mediate Contraction-induced Attenuation of Sympathetic Vasoconstriction in Rat ...
Sympathetic vasoconstriction is sensitive to inhibition by metabolic events in contracting rat and human skeletal muscle,
vasoconstriction in intact coronary arteries (23) and in isolated
Sympathetic vasoconstriction is attenuated similarly during two consecutive contraction periods in the absence of any intervention (Protocol 2a).
www.jci.org /cgi/content/full/99/11/2602   (4678 words)

  
 Signaling Mechanisms for Muscarinic Receptor-Mediated Coronary Vasoconstriction in Isolated Rat Hearts -- Zhang and ...
Values for baseline perfusion pressure, maximal vasoconstriction, maximal percentage inhibition, and curve steepness coefficient are expressed as the arithmetic mean ± S.E. Data for ED are expressed as the geometric mean with a 95% CI.
Hodgson JM and Marshall JJ (1989) Direct vasoconstriction and endothelium-dependent vasodilation: Mechanisms of acetylcholine effects on coronary flow and arterial diameter in patients with nonstenotic coronary arteries.
Sakai K (1980) Coronary vasoconstriction by locally administered acetylcholine, carbachol and bethanechol in isolated, donor-perfused, rat hearts.
jpet.aspetjournals.org /cgi/content/full/293/1/96   (6053 words)

  
 The Endothelin A Receptor Antagonists PD 156707 (CI-1020) and PD 180988 (CI-1034) Reverse the Hypoxic Pulmonary ...
The Endothelin A Receptor Antagonists PD 156707 (CI-1020) and PD 180988 (CI-1034) Reverse the Hypoxic Pulmonary Vasoconstriction in the Perinatal Lamb
Ivy DD, Parker TA and Abman SH (2000) Prolonged endothelin B receptor blockade causes pulmonary hypertension in the ovine fetus.
Wang Y, Coe Y, Toyoda O and Coceani F (1995) Involvement of endothelin-1 in hypoxic pulmonary vasoconstriction in the lamb.
jpet.aspetjournals.org /cgi/content/full/302/2/672   (5959 words)

  
 British Journal of Pharmacology - Evidence for two different P2X-receptors mediating vasoconstriction of Ap5A and Ap6A ...
Various studies have shown that the vasoconstrictive effects of ATP on the renal microvasculature are mainly observed in arcuate and interlobular arteries and glomerular afferent arterioles (Inscho et al., 1992; 1994; 1995).
Considering a role of vasoconstrictor diadenosine polyphosphates in essential hypertension, a permanent elevation of vascular tone has to be reconciled with the current knowledge on vasoconstrictor purinoceptor subtypes (Burnstock 1996), by which diadenosine polyphosphates could affect vascular tone especially in the kidney.
The concentration-response curves were not parallel, and the maximal vasoconstriction, especially for the permanent vasoconstriction, varied considerably (Figure 1A−D).
www.nature.com /bjp/journal/v127/n6/full/0702667a.html   (3873 words)

  
 Inhibition of {alpha}-adrenergic vasoconstriction in exercising human thigh muscles -- Wray et al. 555 (2): 545 -- The ...
Inhibition of {alpha}-adrenergic vasoconstriction in exercising human thigh muscles -- Wray et al.
Metabolic modulation of sympathetic vasoconstriction in human skeletal muscle: role of tissue hypoxia.
Impaired modulation of sympathetic vasoconstriction in contracting skeletal muscle of rats with chronic myocardial infarctions: role of oxidative stress.
jp.physoc.org /cgi/content/full/555/2/545   (6885 words)

  
 Neuropeptide Y antagonism reduces reflex cutaneous vasoconstriction in humans -- Stephens et al. 287 (3): H1404 -- AJP ...
and NPY are the principal mediators of reflex cutaneous vasoconstriction.
Neuropeptide Y accounts for sympathetic vasoconstriction in guinea-pig vena cava: evidence using BIBP 3226 and 3435.
Sympathetic nonnoradrenergic cutaneous vasoconstriction in women is associated with female reproductive hormone status.
ajpheart.physiology.org /cgi/content/full/287/3/H1404   (3918 words)

  
 {alpha}-Adrenoceptor-mediated coronary vasoconstriction is augmented during exercise in experimental diabetes mellitus ...
{alpha}-Adrenoceptor-mediated coronary vasoconstriction is augmented during exercise in experimental diabetes mellitus -- Setty et al.
of the cardiac plexus induces vasoconstriction in alloxan-induced
coronary vasoconstriction both in vitro (43) and in vivo (11).
jap.physiology.org /cgi/content/full/97/1/431   (3366 words)

  
 Hypoxic pulmonary vasoconstriction in cardiothoracic surgery: basic mechanisms to potential therapies -- Tsai et al. 78 ...   (Site not responding. Last check: 2007-10-21)
Hypoxic pulmonary vasoconstriction in cardiothoracic surgery: basic mechanisms to potential therapies -- Tsai et al.
Hypoxic pulmonary vasoconstriction is postulated to be an adaptive
Hypoxic pulmonary vasoconstriction and pulmonary artery tissue cytokine expression are mediated by protein kinase C
ats.ctsnetjournals.org /cgi/content/abstract/78/1/360   (280 words)

  
 Adenosine-induced renal vasoconstriction in diabetes mellitus rats: role of nitric oxide -- Pflueger et al. 276 (3): ...
Adenosine-induced renal vasoconstriction in diabetes mellitus rats: role of nitric oxide -- Pflueger et al.
Adenosine-induced renal vasoconstriction in diabetes mellitus rats: role of nitric oxide
Inhibition of nitric oxide synthesis in forearm vasculature of insulin-dependent diabetic patients: blunted vasoconstriction in patients with microalbuminuria.
ajprenal.physiology.org /cgi/content/full/276/3/F340   (4485 words)

  
 Thromboxane Receptor Mediates Renal Vasoconstriction and Contributes to Acute Renal Failure in Endotoxemic Mice -- ...
Thromboxane Receptor Mediates Renal Vasoconstriction and Contributes to Acute Renal Failure in Endotoxemic Mice -- Boffa et al.
renal vasoconstriction and emphasizes the primary role of TP receptors on renal hemodynamics during sepsis.
vasoconstriction and alleviates reductions in RBF and in GFR
jasn.asnjournals.org /cgi/content/full/15/9/2358   (4279 words)

  
 Exaggerated Renal Vasoconstriction During Exercise in Heart Failure Patients -- Middlekauff et al. 101 (7): 784 -- ...   (Site not responding. Last check: 2007-10-21)
Exaggerated Renal Vasoconstriction During Exercise in Heart Failure Patients -- Middlekauff et al.
the duration of reflex renal vasoconstriction are exaggerated
In summary, during exercise, reflex renal vasoconstriction is exaggerated
circ.ahajournals.org /cgi/content/full/101/7/784   (3616 words)

  
 Rho-Kinase Inhibition Blunts Renal Vasoconstriction Induced by Distinct Signaling Pathways In Vivo -- Cavarape et al. ...   (Site not responding. Last check: 2007-10-21)
vasoconstriction in response to CPA was observed in the distal
Effect of the ROK inhibitor Y-27632 on renal vasoconstriction induced by guanylyl cyclase inhibition.
induce vasoconstriction in the presence of the ROK inhibitor
jasn.asnjournals.org /cgi/content/full/14/1/37   (5108 words)

  
 Renal microvascular actions of calcitonin gene-related peptide -- Reslerova and Loutzenhiser 274 (6): 1078 -- AJP - ...
Percent inhibition of myogenic vasoconstriction were calculated for pressures of 140-180 mmHg and combined.
Multiple factors contribute to acetylcholine-induced vasodilation during myogenic, norepinephrine- and KCl-induced afferent arteriolar vasoconstriction: studies in the isolated perfused hydronephrotic kidney.
Adrenomedullin and calcitonin gene-related peptide in the rat isolated kidney and in the anaesthetised rat: in vitro and in vivo effects.
ajprenal.physiology.org /cgi/content/full/274/6/F1078   (3911 words)

  
 Thunderclap headache, reversible cerebral arterial vasoconstriction, and unruptured aneurysms -- Singhal and Dodick 73 ...
Thunderclap headache, reversible cerebral arterial vasoconstriction, and unruptured aneurysms -- Singhal and Dodick 73 (1): 96 -- Journal of Neurology, Neurosurgery, and Psychiatry
It is conceivable that patients who develop cerebral vasoconstriction
Cerebral vasoconstriction and stroke after use of serotonergic drugs.
jnnp.bmjjournals.com /cgi/content/full/73/1/96-a   (712 words)

  
 Cytosolic phospholipase A2 in hypoxic pulmonary vasoconstriction -- Ichinose et al. 109 (11): 1493 -- Journal of ...
Cytosolic phospholipase A2 in hypoxic pulmonary vasoconstriction -- Ichinose et al.
Hypoxic pulmonary vasoconstriction is modified by P-450 metabolites.
Marshall, C., Mamary, A.J., Verhoeven, A.J., and Marshall, B.E. Pulmonary artery NADPH-oxidase is activated in hypoxic pulmonary vasoconstriction.
www.jci.org /cgi/content/full/109/11/1493   (3839 words)

  
 Cigarette Smoking
Women who quit smoking as late as the first trimester may diminish some of these risks, but the risk of certain congenital malformations--such as cleft palate--is increased even in women who quit early in pregnancy.
(vasoconstriction decreases the flow of oxygen and nutrients to facial skin cells).
The effect of this reduced blood flow is visible in deep crow's feet radiating from the corners of the eyes and pale, grayish, wrinkled skin on the cheeks.
tuberose.com /Cigarette_Smoking.html   (2698 words)

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