An official website of the United States government
Here’s how you know
Official websites use .gov A
.gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A
lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Vasoconstriction is constriction or narrowing of a blood vessel. When a blood vessel constricts, the flow of ... or slowed. Medications may be used to treat vasoconstriction or to cause vasoconstriction.