It was reported that lead polarity switch caused the patient to experience pocket stimulation.Additionally, there was high thresholds, low impedance and oversensing on the right ventricular (rv) lead.Due to no capture at max output, the patient was permanently reprogrammed to unipolar.The lead remains in use.No further patient complications have been reported as a result of this event.
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Product event summary: the device was not returned for analysis.However, performance data collected from the device was received and analyzed.Analysis of the device memory indicated oversensing due to non-physiologic signals/sensing integrity counter.Analysis of the device memory indicated the impedance of the right ventricular pacing lead was below the expected lower range.If information is provided in the future, a supplemental report will be issued.
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