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Definition of Pressor

  • 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.

Pressor: Causing a rise in blood pressure.

A pressor base is a substance (chemically classified as a base) capable of raising the blood pressure.

A pressor nerve is a nerve that, when stimulated, increases the blood pressure.

A pressor reflex is a nerve reflex that constricts arterioles (small blood vessels) and thereby increases the blood pressure.

A pressor substance is any substance that elevates arterial blood pressure. For example, prostacyclin (also known as prostaglandin PGI2) is a potent pressor agent.

The word "pressor" comes from the French verb "presser" meaning "to exert pressure" or "to squeeze."

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Reviewed on 12/27/2018

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