The Implantable Cardioverter
Defibrillator pictured is underneath a U.S. Quarter
Implantable Cardioverter Defibrillator (ICD) An ICD is a device used to help control your heart rate and delivers a shock to the heart should it go into a fatal arrhythmia (irregular heartbeat). It is sometimes recommended for people who have weak heart muscles due to congestive heart failure (CHF) or those diagnosed with " Sudden Death " a condition where the heart rhythm suddenly changes to a rhythm that does not sustain life (i.e. ventricular fibrillation).