It was reported that the patient received high voltage therapy for paroxysmal atrial fibrillation (af) with rapid ventricular response that accelerated to ventricular tachycardia (vt).It was also reported that the left ventricular (lv) lead exhibited high threshold and no capture.A revision procedure was scheduled.It was also reported that during the procedure, a left ventricular setscrew problem was noted on the cardiac resynchronization therapy defibrillator (crt-d) that caused the lv lead to be lose inside the header.During the lv explant, extraction difficulty was encountered.The physician used a locking stylet and the lead was successfully removed.A new lv lead was implanted.The crt-d was explanted and replaced.No further patient complications have been reported as a result of this event.
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