This rv lead had exhibited noise and oversensing resulting in pacing inhibition for greater than 2 seconds of asystole for a pacemaker dependent patient, requiring intervention.Additionally, report of intentional off label use by plugging this rv lead into the lv port and programming lv sensing off and plugging the lv lead into the rv port.No additional adverse patient effects were reported.It was reported that this cardiac resynchronization therapy defibrillator (crt-d) system was exhibiting suspected pacing inhibition above five seconds and high out of range right ventricular (rv) lead impedance measurements.Noise was noted from a non sustained ventricular tachycardia episode which was identified to be correlated with patient surgery.Technical services (ts) was consulted and recommended system testing options.This crt-d system remains in service.The patient will continue to be monitored.No adverse patient effects were reported.
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