Implantable Cardioverter (ICD) - Defibrillator

An Implantable Cardioverter Defibrillator is a device that continuously monitors the heart rhythm to detect any dangerous abnormal rhythms.  Many of these devices will record any abnormalities when they occur so that doctors can review them during regular office visits and discuss further treatment options. 

An ICD is similar to a pacemaker because it consists of a battery and pulse generator connected to one or more wires that are threaded through the blood vessels to the heart.  The ICD is usually implanted directly below the shoulder.  When the ICD detects a heart rhythm too rapid or irregular it will deliver a shock that resets the heart back into a normal heartbeat and electrical pattern.  ICDs are used to protect patients who are at risk for sudden cardiac death from ventricular tachycardia or fibrillation.