This guide educates patients about Implantable Cardioverter Defibrillator (ICD) implantation, a device that monitors heart rhythm and delivers electrical shocks to treat life-threatening arrhythmias. It covers the procedure process including pre-operative preparation, surgical implantation steps, post-operative care with activity restrictions, potential complications like infection or pneumothorax, follow-up requirements at the pacemaker clinic, and long-term device management including battery replacement after 7-10 years.