An implantable cardiac defibrillator (ICD) is a device inserted into the body to detect and correct specific abnormal heart rhythms, known as arrhythmias. These devices continuously monitor the heart's rhythm to identify excessively fast arrhythmias, such as rapid regular or irregular beating of the ventricles, which are the heart's lower chambers. These conditions can significantly reduce the heart's pumping efficiency and elevate the risk of sudden cardiac arrest and other serious complications. Such arrhythmias are often found in individuals with heart muscle disorders or cardiomyopathies, posing a serious threat to life.Modern defibrillators can be implanted using minimally invasive techniques due to their smaller size and advanced technology, with the device roughly comparable in size to a pager. They work by delivering precisely calibrated and timed electrical shocks to the heart as needed, helping to restore a normal heartbeat.

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