Implantable cardioverter-defibrillator

An implantable cardioverter-defibrillator (ICD) is a small battery-powered electrical impulse generator which is implanted in patients who are at risk of sudden cardiac death due to ventricular fibrillation. The device is programmed to detect cardiac arrhythmia and correct it by delivering a jolt of electricity. In current variants, the ability to revert ventricular fibrillation has been extended to include both atrial and ventricular arrhythmias as well as the ability to perform biventricular pacing in patients with congestive heart failure or bradycardia.

What is Heart Defibrillator?

A defibrillator is a machine used to shock the victim's heart and restore the heart's normal rythmic patterns. When a defibrillator is used, it in effect kicks the heart into action again, causing it to resume sending blood throughout the body.