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Slowness of the heartbeat, usually defined (by convention) as a rate under 50 beats/minute.
[brady- + G. kardia, heart]
bradyrhythmia(brăd″ē-rĭth′mē-ă) [″ + rhythmos, rhythm]
1. Slowness of heart or pulse rate.
2. In electroencephalography, slowness of brain waves (1 to 6 per sec).