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Definition Return to top
Vasoconstriction 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:
Medications may be used to increase or reduce vasoconstriction in very ill patients.Update Date: 2/23/2009 Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.