beta-blocker

beta blocker

noun Pharmacology.
any of various substances that interfere with the action of the beta receptors: used primarily to reduce the heart rate or force in the prevention, management, or treatment of angina, hypertension, or arrythmias.
Also, beta-blocker.
Compare alpha blocker.


Origin:
1975–80

beta-blocking, adjective
Dictionary.com Unabridged
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World English Dictionary
beta-blocker
 
n
any of a class of drugs, such as propranolol, that inhibit the activity of the nerves that are stimulated by adrenaline; they therefore decrease the contraction and speed of the heart: used in the treatment of high blood pressure and angina pectoris

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

beta-blocker n.
A drug that opposes the excitatory effects of norepinephrine released from sympathetic nerve endings at beta-adrenergic receptors and is used for the treatment of angina, hypertension, arrhythmia, and migraine. Also called beta-adrenergic blocking agent.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
beta-blocker   (bā'tə-blŏk'ər)  Pronunciation Key 
A drug that blocks the excitatory effects of epinephrine on the cardiovascular system by binding to cell-surface receptors (called beta-receptors). Beta-blockers are used to treat high blood pressure, angina, and certain abnormal heart rhythms.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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