Vasoconstriction
Severe vasoconstriction may result in symptoms of intermittent claudication. The mechanism that leads to vasoconstriction ... Ambient temperature is an example of exogenous vasoconstriction. Cutaneous vasoconstriction will occur because of the body's ... Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in ... Generalized vasoconstriction usually results in an increase in systemic blood pressure, but it may also occur in specific ...
Hypoxic pulmonary vasoconstriction
This hypoxia causes vasoconstriction that ultimately leads to high altitude pulmonary edema (HAPE). For this reason, some ... Hypoxic pulmonary vasoconstriction (HPV), also known as the Euler-Liljestrand mechanism, is a physiological phenomenon in which ... The standard drug treatment of dexamethasone does not alter the hypoxia or the consequent vasoconstriction, but stimulates ... Porcelli RJ, Viau A, Demeny M, Naftchi NE, Bergofsky EH (1977). "Relation between hypoxic pulmonary vasoconstriction, its ...
Reversible cerebral vasoconstriction syndrome
... (RCVS, sometimes called Call-Fleming syndrome) is a disease characterized by a ... Less than 5% of patients experience progressive vasoconstriction, which can lead to stroke, progressive cerebral edema, or even ... A 2007 review by Leonard Calabrese and colleagues proposed the name reversible cerebral vasoconstriction syndrome, which has ... Mehdi, A. & Hajj-Ali, R. A. (2014). "Reversible cerebral vasoconstriction syndrome: a comprehensive update". Current Pain and ...
Alpha-adrenergic agonist
vasoconstriction and mydriasis; used as vasopressors, nasal decongestants and during eye exams). Selected examples are: ...
Surface chemistry of microvasculature
"Vasodilation and Vasoconstriction: Real Story." Vasodilation and Vasoconstriction. 2011. Web. 21 May 2012. University of ... Decreases and increases in temperature trigger vasoconstriction and vasodilation respectively. Vasoconstriction affects flow ... Like vasoconstriction, vasodilation can be caused by internal and external factors. For example, nitric oxide, found in food, ... Typical values are in the range 100-300 dynes×sec×cm-5. Vasodilation is, in essence, the opposite of vasoconstriction. In ...
Oxygen therapy
While the mechanism of the vasoconstriction is unknown, one proposed theory is that increased reactive oxygen species from ... Sylvester JT, Shimoda LA, Aaronson PI, Ward JP (January 2012). "Hypoxic pulmonary vasoconstriction". Physiological Reviews. 92 ...
Pulmonary shunt
... thus triggering vasoconstriction. This vasoconstriction is triggered by a smooth muscle reflex, as a consequence of the low ... "Hypoxic pulmonary vasoconstriction". Physiological Reviews. 92 (1): 367-520. doi:10.1152/physrev.00041.2010. ISSN 1522-1210. ...
Platelet plug
It occurs after vasoconstriction. During the process, platelets begin to accumulate, or aggregate, on the damaged vessel wall.[ ... As such, platelet plug formation occurs after vasoconstriction of the blood vessels but before the creation of the fibrin mesh ...
Thermoregulation in humans
This process is called vasoconstriction. It is impossible to prevent all heat loss from the blood, only to reduce it. In ... extremely cold conditions, excessive vasoconstriction leads to numbness and pale skin. Frostbite occurs only when water within ...
Ergotism
Vasoconstriction is treated with vasodilators. Historically, eating grain products, particularly rye, contaminated with the ... The dry gangrene is a result of vasoconstriction induced by the ergotamine-ergocristine alkaloids of the fungus.[citation ...
Haemodynamic response
It involves vasoconstrictions of blood vessels connected to and within the lungs. As a result, the heart has a hard time ... Endothelial dysfunction induces coronary vasoconstriction. This is caused by catecholamine release and by infections. Severe ... which acts through yet to-be-determined mechanisms to induce vasoconstriction. It has also been shown that agonists of ...
Parotid gland
They act to cause vasoconstriction.: 359-360 Parasympathetic Preganglionic parasympathetic fibers for the parotid gland arise ...
Cocaine intoxication
Heat loss is also inhibited by the cocaine-induced vasoconstriction. Cocaine and/or associated hyperthermia may cause muscle ... Calcium channel blockers may also be used to treat hypertension and coronary arterial vasoconstriction, but fail to lower ... Cocaine and its metabolites may cause arterial vasoconstriction hours after use. Epicardial coronary arteries are especially ... The phenomenon of "unopposed alpha-stimulation," in which blood pressure increases or coronary artery vasoconstriction worsens ...
Local blood flow regulation
Both of these factors affect pH and, in turn, the balance between vasodilation versus vasoconstriction in the brain. So, the ... Vasodilation Vasoconstriction Vascular resistance "CV Physiology , Local Regulation of Blood Flow". www.cvphysiology.com. ... Pulmonary (lung) circulation undergoes hypoxic vasoconstriction, which is a unique mechanism of local regulation in that the ... endothelin-1 causes vasoconstriction. Below are several examples of differing types of local blood flow regulation by specific ...
Coagulation
Hemostasis consists of four main stages: Vasoconstriction (vasospasm or vascular spasm): Here, this refers to contraction of ... vasoconstriction, and its prevention". Texas Heart Institute Journal. 22 (2): 180-184. ISSN 0730-2347. PMID 7647603. Yau, ...
Choking game
... but in the brain alone it causes vasoconstriction (narrowing of the blood vessels)[citation needed]. This vasoconstriction ... Vasoconstriction is only reversed by the build-up of carbon dioxide in the blood through suspension of breathing. In some ... Increase in blood pH, (respiratory alkalosis). Vasoconstriction of blood vessels supplying brain. Pooling of the blood present ... it is highly vulnerable if vasoconstriction is not reversed. Normally, if the brain is hypoxic, autonomous systems in the body ...
AVP gene
The products of AVP have many functions that include vasoconstriction, regulating the balance of water in the body, and ... This pathway typically involves regulating vasoconstriction. When vasopressin binds to AVPR1B, a GPCR, the phosphatidylinositol ... vasoconstriction, and response to stress, vasopressin can be helpful in the treatment of conditions related to these functions ...
Compliance (physiology)
Vasodilation and vasoconstriction are complex phenomena; they are functions not merely of the fluid mechanics of pressure and ...
Complex regional pain syndrome
This may be involved in its pathology by enhancing sympathetic activity, vasoconstriction, or by some other unknown ... dysfunction of local vasoconstriction and vasodilation; and maladaptive neuroplasticity. The signs and symptoms of CRPS usually ...
Vasodilation
The process is the opposite of vasoconstriction, which is the narrowing of blood vessels. When blood vessels dilate, the flow ... The spinal cord has both vasodilation and vasoconstriction nerves. The neurons that control vascular vasodilation originate in ... The opposite physiological process is vasoconstriction. These processes are naturally modulated by local paracrine agents from ... Charkoudian, Nisha (2010). "Mechanisms and modifiers of reflex induced cutaneous vasodilation and vasoconstriction in humans". ...
Daniel Gopher
ani, C., Gopher, D., Lavie, P. (2004). Peripheral vasoconstriction reflects exerted mental effort. Psychophysiology, 41, pp 789 ...
Hypothermia
Sessler DI, Moayeri A, Støen R, Glosten B, Hynson J, McGuire J (1990). "Thermoregulatory vasoconstriction decreases cutaneous ... In essence, hypothermia increases preglomerular vasoconstriction, thus decreasing both renal blood flow (RBF) and GFR. Accurate ...
Wrinkle
This insight resulted in bedside tests for nerve damage and vasoconstriction. Wrinkling is often scored with immersion of the ... Einar P.V. Wilder-Smith; Adeline Chow (2003). "Water-immersion wrinkeling is due to vasoconstriction". Muscle & Nerve. 27 (3): ... Recent research shows that wrinkling is related to vasoconstriction. Water probably initiates the wrinkling process by altering ...
Serotonin
Additionally, it is stored in blood platelets and is released during agitation and vasoconstriction, where it then acts as an ... Their function is probably vasoconstriction during hypoxia. Serotonin is also produced by Merkel cells which are part of the ... In 2003 these lipocalins were demonstrated to sequester serotonin to prevent vasoconstriction (and possibly coagulation) in the ... and numerous physiological processes such as vomiting and vasoconstriction. This multifacetedness has led to its study being ...
Asymmetric dimethylarginine
Arginine Hypertension Protein detoxification Vasoconstriction Vallance, P.; Leone, A.; Calver, A.; Collier, J.; Moncada, S. ( ...
5-HT1B receptor
Activation of these receptors results in vasoconstriction. The high distribution of vasoconstrictive 5-HT1B and 5-HT1D ...
Pulmonary hypertension
This phenomenon is called hypoxic pulmonary vasoconstriction and it is initially a protective response to stop too much blood ... When the alveolar hypoxia is widespread and prolonged, this hypoxia-mediated vasoconstriction occurs across a large portion of ... Plasma levels of serotonin, which promotes vasoconstriction, hypertrophy and proliferation, are increased in patients with PAH ... The mechanisms involved in this narrowing process include vasoconstriction, thrombosis, and vascular remodeling (excessive ...
Losartan
... angiotensin II causes vasoconstriction and aldosterone release. Aldosterone serves to retain sodium from the distal renal ...
Vasomotion
Vasoconstriction Vasodilation Vasospasm Haddock RE, Hill CE. Rhythmicity in arterial smooth muscle. J Physiol (Lond ). 2005; ...
5-HT1D receptor
It also induces vasoconstriction in the brain. 5HT1D receptors are found at low levels in the basal ganglia (globus pallidus, ...