Abstract：Various reasons may lead to inappropriate shocks of entirely subcutaneous implantable cardioverter defibrillator as the detected frequencies reach the shock zone. These reasons include the oversensing of intracardiac signals (such as T, P, F, f, or U waves), multiple counting of QRS complexes, rapid supraventricular tachycardia, myopotential interference, air entrapment, failure of electrode lead or pulse generator, cardiopulmonary resuscitation, in vitro electromagnetic interference, and SenseBnoise. It is recommended to readjust its parameters by programmable controlling, and actively treat primary diseases. It is required to adjust the electrode lead and pulse generator, or implant a transvenous implantable cardioverter defibrillator instead if necessary.
