Sinus bradycardia, or a slow heart rate, can be a sign of cardiovascular health in healthy young adults and endurance athletes. It can also be a sign of an underlying condition requiring medical ...

sinus bradycardia, sinoatrial block, and alternating episodes of tachycardia and bradycardia. [1] A large proportion of SND patients also have atrial fibrillation (AF) and prolonged sinus pauses ...

[1] Bradycardia or bradyarrhythmia in adults may be considered present if the heart rate is <60 beats/min in the setting of sinus rhythm, a variety of atrial rhythms, including slow atrial ...