antiarrhythmic

[ an-tee-uh-rith-mik, -uh-rith-, an-tahy- ]
/ ˌæn ti əˈrɪð mɪk, -əˈrɪθ-, ˌæn taɪ- /
Pharmacology

adjective

of or relating to any substance that prevents, inhibits, or alleviates heartbeat irregularities.

noun

any such substance, as lidocaine.

Origin of antiarrhythmic

First recorded in 1950–55; anti- + arrhythmic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for antiarrhythmic

antiarrhythmic
[ ăn′tē-ə-rĭðmĭk, ăn′tī- ]

adj.

Preventing or alleviating irregularities in the force or rhythm of the heart.

n.

An antiarrythmic drug.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.