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What is vasoconstriction and is there a treatment?


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2013-04-15 03:04:55
2013-04-15 03:04:55

vasoconstriction is when some blood vessels (arteries, arterioles, etc) constrict and essentially increase the impedance to blood flow. This is known as vascular resistance, and is a major contributor to blood pressure (hypertension).

Blood vessels are usually in a state of relative constriction, but can constrict further in respone to cold (thermoregulation), to low blod volume or low blood pressure (shock/maintaining a normotensive state/maintaining perfusion pressure) or to signals from the nervous system, which can be replicated by the administration of drugs (e.g. adrenalin).

Treatment for vasoconstriction would include the use of vasodilators- alpha adrenoceptor antagonists, or calcium-channel blockers. The latter group of drugs is often used in the treatment of hypertension.


Related Questions

Does vasoconstriction make vessels smaller?

Vasoconstriction is the term used for constriction of the blood vessels. An example of a sentence using the word "vasoconstriction" is "Exposure to extreme cold results in vasoconstriction of the extremities and surface of the body. "

no, vasoconstriction increases blood pressure

cold weather causes vasoconstriction. Vasoconstriction restricts blood flow near the skin, so less heat is lost through the skin.

Vasoconstriction is the constriction or narrowing of blood vessels by small muscles in their walls, slowing or blocking blood flow. Vasoconstriction is the constriction of blood vessels that increases blood pressure.

No. Vasoconstriction is a squeezing of the veins. This is like putting your thumb at the end of a garden hose. The constriction of the flow increases the pressure. The water shoots out faster from the hose when your thumb is blocking the way. If the entire hose were to tighten, as in vasoconstriction, the same effect happens.--From Wikipedia: Vasoconstriction"Generalized vasoconstriction usually results in an increase in systemic blood pressure..."

I believe they are stimulants due to the fact that cocaine is a stimulant and it causes vasoconstriction.

Vasoconstriction means the constriction of blood vessels.Vasodilation means there is more banter swag in the penis

Vasoconstriction is when the blood vessels are narrowed. This is a result that occurs due to contractions of the muscular wall within these blood vessels.

High blood pressure is the most common cause of prolonged vasoconstriction in the kidney.

Sympathetic Nervous system causes vasoconstriction, whereas parasympathetic tone causes vasodilation.

ADH does not exactly cause the vasoconstriction but increases the peripheral vascular resistancewhich results increases of arterial blood pressure

Norepinephrine and Glucocorticoids

vasoconstriction is when your blood vessels contract.

Peripheral vasoconstriction can in fact kill you. However, it is very rare. Instead, it is usually characterized by horrible spinal and back pain.

Vasoconstriction stops a person from hemorrhaging and prevents severe blood loss by restricting overall blood flow. It occurs on the walls of the blood vessels.

DefinitionVasoconstriction is the narrowing (constriction) of blood vessels by 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. Medications that cause vasoconstriction include:Decongestants, including pseudoephedrineCough and cold combinationsCaffeineMedications may be used to increase or reduce vasoconstriction in very ill patients.

Peripheral vasoconstriction is the tightening of the blood vessels, particularly the arteries. It is caused by smoking, drinking alcohol and coffee, as well as the intake of medicine such as antihistamine.

vasoconstriction occurs when there is a narrowing of the blood vessels which results from contractions of the muscular wall of the vessel. More closely, the large arteries, small arterioles and veins.

Epinephrine should be safe in open angle glaucoma. It causes vasoconstriction, and results in a reduced amount of aqueous humor production.

Vasodilation is relaxation of blood vessels leading to increase in lumen size. Vasoconstriction is contraction of blood vessels leading to decrease in lumen size.

Atherosclerosis can cause hypertension because it narrows the blood vessels (similar to vasoconstriction). Vasoconstriction can cause hypertension because it increases pressure and force in the vessels.

by vasoconstriction and opening of the airway

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