In this video, Dr. Aparna Jaswal, Cardiologist, Fortis Escorts Heart Institute, will talk on different types of pacemakers. She will show two-wired and three wired pacemaker device. She will further explain how the wires goes into right atrium, right ventricle and left ventricle. The whole unit of pacemaker is implanted under the collar bone and the wires goes to the heart. She will also explain the implantable cardioverter defibrillator (ICD) device.