Slow heart rate, less than 60 beats per minute.

Bradycardia can be physiologic and normal, for example during sleep or in athletes.

However, bradycardia can also constitute a pathological state, resulting from a problem in the generation of the electrical stimulus in the heart or in impaired electrical conduction. The clinical significance depends on rate (how slow the rhythm), on duration of the disturbance and on the general state of the patient.

If necessary, the treatment may be by medication or by implanting a pacemaker.