Boston scientific received information that the clinician contacted boston scientific technical services (ts) and asked them to review the presenting electrogram (egm) on the remote monitoring system.Upon review ts found that it showed an extra signal on the right ventricular (rv) channel about 350 milliseconds after every paced marker.It was noted that there was not a similar signal on the left ventricular (lv) egm.Further review noted that this also occurred on the presenting egm from the day after implant.The rv automatic threshold egm was reviewed and the extra signal was not present.Ts stated that this could possibly be because the device is rv only pacing at that point.Although the patient was not symptomatic, the patient did report feeling the same way as prior to receiving the cardiac resynchronization therapy pacemaker (crt-p).The rv threshold appears appropriate and the lv impedance varies between 1170-1430.Ts discussed possible reasons for this to occur and suggested bring the patient in for evaluation.According to the field representative the patient has not been brought in for evaluation to date and the system remains in service.
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