Boston scientific received information that, shortly after implant, this pacemaker exhibited loss of capture and recorded a lead safety switch due to high out of range pacing impedances on the right ventricular (rv) channel.A revision procedure was performed and blood contamination was noted in the device header.The rv lead was tested via a pacing system analyzer (psa) with good parameters but the measurements remained high when reconnected to this pacemaker.This pacemaker was removed and replaced.No additional adverse patient effects were reported.
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