Implantable cardiac defibrillator
![Implantable cardiac defibrillator](../../graphics/images/en/22914.jpg)
Implantable cardiac defibrillator
An implantable cardioverter-defibrillator (ICD) is a device that detects a life-threatening, rapid heartbeat, called an arrhythmia. If such a heartbeat occurs, the ICD quickly sends an electrical shock to the heart to change the rhythm back to normal.