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.

Tachycardia and bradycardia are two types of irregular heart rates. Tachycardia is when the heart beats faster than 100 beats per minute. Bradycardia is when the heart beats slower than 60 beats per ...