An Implantable Cardioverter Defibrillator (ICD) is a battery-powered device placed under your skin, beneath the collarbone, that monitors your heart rate. It uses batteries to send electric signals to a heart that's beating too slow, same as a pacemaker. It can also deliver an electric shock to help restore a normal heartbeat to a heart that's beating chaotically and much too fast.
![](images/cvml_divider.jpg)