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Definition of Vasodilation

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Vasodilation: Widening of blood vessels that results from relaxation of the muscular walls of the vessels. What widens in vasodilation is actually
the diameter of the interior (lumen) of the vessel. The opposite of vasodilation is vasoconstriction.

Reviewed on 12/27/2018

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