definition vasodepressor
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- Vasodepressor syncope: The temporary loss of consciousness in a particular kind of situation. (Syncope is temporary loss of consciousness or, in plain English, fainting). The situations that trigger this reaction are diverse and include having blood drawn, straining while urinating or defecating or coughing. The reaction also can be due to the emotional stress of fear or pain.
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- Examples of Common Pituitary Disorders. 1  Pituitary tumors: may be hormone-secreting or non-secreting; most are benign; may cause visual disturbances and headaches as they grow and compress surrounding tissues; they often result in excessive amounts of one pituitary hormone and decreases in others.hile most are benign, they can produce excessive amounts of a specific pituitary hormone, crowd out the production of other hormones, and compress surrounding tissues. Blood vessels and the optic nerves are in close proximity to the pituitary gland.
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Vasodilation Vasodilation is the result of relaxation in smooth muscle surrounding the blood vessels. This relaxation, in turn, relies on removing the stimulus for contraction, which depends on intracellular calcium ion concentrations and is tightly linked with phosphorylation of the light chain of the contractile protein myosin.
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vasoconstriction vasoconstriction Active narrowing of small arteries as a result of contraction of the circular smooth muscle fibres in their walls. This severely reduces the flow of blood through them. Compare VASODILATATION. vasoconstriction
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- Wednesday, October 21, 2009. is caffeine a vasoconstrictor or a vasodilator? Caffeine is also a known competitive inhibitor of the enzyme cAMP-phosphodiesterase (cAMP-PDE), which converts cyclic AMP (cAMP) in cells to its noncyclic form, allowing cAMP to build up in cells.
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Vasoconstriction Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries and small arterioles. The process is the opposite of vasodilation, the widening of blood vessels. The process is particularly important in staunching hemorrhage and acute blood loss.
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Ventricular Fibrillation and Pulseless Ventricular Tachycardia Find out here. A vasopressor is a medication that produces vasoconstriction and a rise in blood pressure. The vasopressor that is used for the treatment of VF/Pulseless VT is epinephrine. Epinephrine is primarily used for is vasoconstrictive effects.
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norepinephrine n. A substance, both a hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood.
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Vasodilation Vasodilation (or vasodilatation) refers to the widening of blood vessels. It results from relaxation of smooth muscle cells within the vessel walls, in particular in the large veins, large arteries, and smaller arterioles. In essence, the process is the opposite of vasoconstriction, which is the narrowing of blood vessels.
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Vasoconstriction For example, vasoconstriction is a hypothermic preventative in which the blood vessels constrict and blood must move at a higher pressure to actively prevent a hypoxic reaction. ATP is used as a form of energy to increase this pressure to heat the body.eneralized vasoconstriction usually results in an increase in systemic blood pressure, but it may also occur in specific tissues, causing a localized reduction in blood flow. The extent of vasoconstriction may be slight or severe depending on the substance or circumstance.
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vasodilator Medical Definition of vasodilator. : an agent (as a parasympathetic nerve fiber or a drug) that induces or initiates vasodilation.
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Dopamine Dopamine is a chemical naturally produced in the body. In the brain, dopamine functions as a neurotransmitter, activating dopamine receptors. Dopamine can be supplied as a medication that acts on the sympathetic nervous system, producing effects such as increased heart rate and blood pressure. Note: The above text is excerpted from the Wikipedia article Dopamine, which has been released under the GNU Free Documentation License.
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- Vasopressin is a peptide hormone that increases water permeability of the kidney's collecting duct and distal convoluted tubule by inducing translocation of aquaporin-CD water channels in the plasma membrane of collecting duct cells. It also increases peripheral vascular resistance, which in turn increases arterial blood pressure.
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What is a Vasoconstrictor? Main Image: Vasoconstrictor is the one which causes constriction of the blood vessels. Vasoconstriction is the contraction of the blood vessels resulting from contraction of the muscular wall of the vessels, mainly the large arteries, small arterioles and veins.asoconstrictor is any substance that makes the layer of smooth muscle in the blood vessels to contract and as a result constricting the width of the blood vessel.
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Cardiomyopathy Vasodilators are commonly used to reduce symptoms of heart failure and can prolong the life of people with dilated cardiomyopathy. Angiotensin-converting enzyme (ACE) inhibitors and angiotensin receptor blockers (ARBs) are examples of vasodilators, which cause blood vessels throughout the body to relax.
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vasoconstriction constriction of the blood vessels, as by the action of a nerve. On the contrary, vasoconstriction causes a rise in diastolic pressure and a fall in pulse pressure. vasoconstriction means literally causing contraction of the vessels, which is exactly what this center does. n.
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- A substance, both a hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood. Also called levarterenol, noradrenalin.
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Types of Opioids Used to Treat Chronic Pain Opioids Used to Treat Chronic Pain. Codeine -- Codeine is a pain medication that is taken by mouth. It is short-acting, meaning it lasts only for a few hours per dose. Codeine is often combined with acetaminophen though it may also be administered with aspirin.
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Vasoconstriction Vasoconstriction is the process of constriction of blood vessels, which may result in decrease of flow of blood. Normal blood flow is necessary for carrying oxygenated blood to all parts of the body and when the normal flow is disrupted it may cause various problems.
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Vasoconstriction Definition. Information. Vasoconstriction is the narrowing (constriction) of blood vessels by small muscles in their walls. When blood vessels constrict, the flow of blood is restricted or slowed.Vasoconstriction may be slight or severe. It may result from disease, medication, or psychological conditions.efinition. Information. Vasoconstriction is the narrowing (constriction) of blood vessels by small muscles in their walls. When blood vessels constrict, the flow of blood is restricted or slowed.
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Vasopressin Vasopressin, also called antidiuretic hormone, hormone that plays a key role in maintaining osmolality (the concentration of dissolved particles, such as salts and glucose, in the serum) and therefore in maintaining the volume of water in the extracellular fluid (the fluid space that surrounds cells).
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Learn About Getting Unsecured Loans with Bad Credit If you’re going to get approved for an unsecured loan, but you have bad credit, it’ll probably only happen with the help of a co-signer. That person applies for the loan with you, promising to repay the loan if you fail do to so. Your co-signer needs to have good credit and sufficient income to pay off the loan.
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norepinephrine n. A substance, both a hormone and neurotransmitter, secreted by the adrenal medulla and the nerve endings of the sympathetic nervous system to cause vasoconstriction and increases in heart rate, blood pressure, and the sugar level of the blood.Also called levarterenol, noradrenalin.n adrenergic hormone (catecholamine) that acts to increase blood pressure by vasoconstriction but does not affect cardiac output. It is synthesized by the adrenal medulla, the peripheral sympathetic nerves, and the central nervous system.
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Vasopressors What are Vasopressors Vasopressors are medicines that constrict (narrow) blood vessels, increasing blood pressure. They are used in the treatment of extremely low blood pressure, especially in critically ill patients.
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angiotensin Any of three polypeptide hormones that function in the body in controlling arterial pressure. The most important is known as angiotensin II, a powerful vasoconstrictor that stimulates steroid production by the adrenal glands, reduces fluid loss from the kidneys, and also functions as a neurotransmitter. Angiotensin II is formed from inactive angiotensin I by the action of angiotensin-converting enzyme (or ACE).
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Vasoconstriction For example, vasoconstriction is a hypothermic preventative in which the blood vessels constrict and blood must move at a higher pressure to actively prevent a hypoxic reaction. ATP is used as a form of energy to increase this pressure to heat the body.