a slow heartbeat rate, usually less than 60 beats per minute.
Origin of bradycardia
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Bradycardia or abnormal slowness of the heart-beat, is the converse of tachycardia.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
A slowness of the heartbeat, usually under 60 beats per minute in adults.brachycardia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.