An implantable cardioverter defibrillator (ICD) (also known as automatic implantable cardioverter defibrillator (AICD) is an electronic device implanted just under the skin of the upper chest, similar to a pacemaker. It is about the size of a pager and performs several functions.
It monitors your heart rhythm continuously. Upon detection of a dangerous rhythm (ventricular tachycardia (VT) and ventricular fibrillation (VF)), the device will either pace or deliver a shock to terminate the dangerous rhythm. The ICD protects patients at risk from premature deaths due to life-threatening heart rhythm. It can also pace the heart when the rate is too slow.
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