Bradycardia refers to a resting heart rate that is slower than usual. A heart rate of fewer than 60 beats per minute (bpm) may indicate an underlying health issue, but this is not always the case.

Bradycardia does not often cause symptoms. If symptoms of bradycardia do occur, they may include fatigue, lightheadedness, and exercise intolerance. A slow heart rate in young people or athletes or ...