In order to treat bradycardia, implantable cardiac pacemakers are widely used

Cardiovascular pacing devices have been widely used to treat bradycardia (delayed or absent activation of the entire ventricle) and Cardiac Resynchronization Therapy since the development of implantable cardiac pacemakers (CRT). Implantable cardiac pacemakers are small devices that are implanted inside the chest or abdomen to control irregular heart rhythms. Pacemakers are also commonly used to treat arrhythmias, which are problems with the rate of rhythm of the heartbeat in which the heart beats too fast at times and too slowly at others, resulting in an irregular rhythm.