Implantable Cardioverter Defibrillator (ICD Registry)

This study is a national registry tracking patients who have received an implantable cardioverter defibrillator (ICD) — a small device placed in the chest that monitors heart rhythm and delivers a shock to correct life-threatening irregular heartbeats — to monitor outcomes and improve care over time. **You may be eligible if...** - You have received or are scheduled to receive an ICD (a device implanted near the heart to prevent sudden cardiac death) - You are being treated at a participating hospital or cardiology center - You are willing to have your health information tracked as part of the registry **You may NOT be eligible if...** - You are not receiving an ICD or related heart device at a participating site - You are unwilling to consent to have your data included in the registry - You have a condition that excludes you from ICD implantation Talk to your doctor to see if this trial is right for you.