It was reported that this pacemaker and right ventricular (rv) lead exhibited intermittent undersensing and small r-waves, resulting in overpacing.The patient was later seen in clinic to reprogram sensitivity, and upon evaluation, intermittent t-wave oversensing was shown to occur in correlation with drops in intrinsic r-wave amplitude.This rv lead remains in service.Ts recommended measuring t-wave amplitude and programming the sensitivity from automatic gain control (agc) to a fixed value above the t-wave amplitude.This pacemaker system remains in service.No adverse patient effects were reported.
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