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Microdislodgment of ventricular pacing lead undetectable during rapid pacing one year after implantation
Yuko Chinushi1, Masaomi Chinushi, Hiroshi Furushima
1First Department of Internal Medicine, Niigata University School of Medicine, 2-746 Asahimachi, Niigata 951-8518, Japan.
Abstract:
A 71-year-old woman had undergone valvular heart surgery in 1981, and implantation of a permanent ventricular pacemaker for ventricular pauses during atrial fibrillation in 2001. One year after pacemaker implantation, she complained of faintness. When pacing at 100 beats/min the pacemaker functioned properly. However, pacing and sensing failure was detected at a pacing rate of 60 beats/min. At rapid pacing rates, the lead tip was in closer contact with the endocardium, and its microdislodgment was undetectable. The symptoms have resolved since the lead was repositioned.