Contrary to tachycardia, bradycardia is a slow or irregular heart rhythm typically fewer than 60 beats per minute. The slowed heart rate causes a decrease of blood flow to the body and may cause dizziness, lack of energy, shortness of breath or fainting during periods of normal activity or exercise.

Device treatment is used to treat bradycardia.

Intracardiac Electroanatomical Mapping can be used to diagnose problem areas in the heart.