In people felt to be at higher risk of sudden cardiac death, an implantable cardioverter-defibrillator (ICD) may be recommended.[1] These small devices implanted under the skin continuously monitor the heart rhythm. If the device detects a potentially life-threatening arrhythmia it can give the heart a small electric shock, stunning the heart back into a normal rhythm.[29] An ICD can also function as a pacemaker, preventing abnormally slow heart rates that can also occur in people with Brugada syndrome.