It was reported that the patient had a ventricular tachycardia (vt) that was initially treated with a burst of anti-tachycardia pacing that increased the ventricular tachycardia (vt) rate, then the atp during charge degenerated the ventricular tachycardia (vt) into a ventricular fibrillation (vf).The cardiac resynchronization therapy defibrillator (crt-d) exhibited high voltage problem despite being programmed to 35 joules (35j) energy level.The first shock delivered measured 7j and all the subsequent were 0j.The device was unable to deliver a full shock energy.Additionally, premature battery depletion was suspected.The device was inactivated and remains in the patient.Subsequently, the patient became deceased.
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