Key result
Mechanical wear of pacemaker lead insulation by the tricuspid valve can cause sudden loss of pacing due to electrical shunting and excessive current drain.
Mechanical wear of pacemaker leads by the tricuspid valve is a potential cause of insulation defects and sudden loss of pacing.
May prompt evaluation for tricuspid valve-related insulation failure in unexplained pacing loss; hypothesis-generating case leaves open prevalence and surveillance needs.
A pacemaker-treated patient is described in whom lead insulation defect caused sudden loss of capture. The defect was caused by mechanical wear of the posterior leaflet of the tricuspid valve and resulted in shunting of the pulse generator with a current drain exceeding the capacity of the pacemaker. In three further cases a similar explanation to sudden loss of pacing was highly suspected.
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KRUSE et al. (1980) studied this question. Mechanical wear of pacemaker lead insulation by the tricuspid valve can cause sudden loss of pacing due to electrical shunting and excessive current drain.
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