Why the study?
Does device interrogation induce inappropriate shocks in patients with fractured Medtronic Sprint Fidelis leads?
Does device interrogation induce inappropriate shocks in patients with fractured Medtronic Sprint Fidelis leads?
Device interrogation can induce electromagnetic interference in fractured Sprint Fidelis leads, leading to inappropriate defibrillator shocks, a risk potentially exacerbated by the 'Auto-resume' feature.
May warrant caution during interrogation of suspected fractured Sprint Fidelis leads; leaves open optimal programmer settings and systematic risk assessment.
We present two patients with fractures within the pace-sense circuit of their Medtronic Sprint Fidelis leads who received inappropriate shocks from their Medtronic defibrillators during device interrogation. This was not simply a coincidence, but due to electromagnetic interference induced within the Sprint Fidelis lead by the device programmer during two-way communication with the defibrillator. Our subsequent investigations have uncovered at least two other similar incidents in Canada. We have also discovered that the Medtronic 'Auto-resume' feature may leave future patients uniquely vulnerable to such inappropriate shocks in the future.
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Farwell et al. (2008) studied this question.
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