It was reported that the right ventricular (rv) his bundle lead exhibited oversensing, short v-v intervals, with isometrics eliciting myopotential noise, which caused pacing inhibition and, furthermore, rare under-sensing with low amplitude r-waves was observed.It was also reported that the implantable pulse generator (ipg) exhibited oversensing of short v-v intervals and ventricular tachycardia (vt) episodes, consistent with electromagnetic interference (emi), with isometrics eliciting myopotential noise, which caused pacing inhibition and, furthermore, rare under-sensing with low amplitude r-waves was observed.Diagnostic testing/troubleshooting was performed and both the ipg and the rv lead were reprogrammed.Three days later, the single chamber ipg was explanted and replaced with a dual chamber ipg.The existing rv his bundle lead was moved to the atrial port and remains in use, with an additional rv septal lead added to the ventricular port.No patient complications have been reported as a result of this event.
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