vasoconstriction(redirected from Vasoconstrictors)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
decrease in the caliber of blood vessels. adj., adj vasoconstric´tive.
Narrowing of the blood vessels.
Constriction of a blood vessel, as by a nerve or drug.
Reduction in the caliber of a blood vessel due to contraction of smooth muscle fibers in the tunica media leading to decreased blood flow to a part.
vasoconstrictionActive 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.
vasoconstrictiona narrowing of the blood vessels, often in response to cold, which occurs through a contraction of INVOLUNTARY muscles in the walls of the vessels brought about by a stimulus from the sympathetic nervous system (see AUTONOMIC NERVOUS SYSTEM).
Constriction of a blood vessel.
Mentioned in: Induction of Labor
Narrowing of blood vessels.