it's actually called a cardiac defibrillator. it is a device that is implanted into the chest wall and has a wire that goes in to 1 or 2 of the lobes of the heart (depending on the type) it is for people who have been diagnosed with ventricular fibrillation, a deadly cardiac rhythm. this device detects when the heart goes into ventricular fibrillation and will shock the heart causing it to stop briefly and restart. this triggers the heart to "re-set" and will hopefully allow the natural heart rhythm (also known as Normal Sinus Rhythm) to take over. without this device, they would die. Only a doctor would be able to tell if the person can resume every activity depending on the severity of the condition and how often the defibrillator "fires" microwaves and cell phones have no effect on defibrillators. Hope this helps.

Thank you so much for this information!!