Dr. Aparna Jaswal, Cardiologist, Fortis Escorts Heart Institute talks about various reasons of pacemaker failure in this video. The pacemaker failure can be due to several reasons but most commonly due to end of service. In India, patients generally don’t come for follow up every six months which is necessary. They come back when the pacemaker stops functioning due to its battery is completely drained. Pacemaker failure can also occur due to lead failure.