EVALUATION STUDY
JOURNAL ARTICLE
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Safety of repetitive nerve stimulation in patients with cardiac implantable electronic devices.

Muscle & Nerve 2013 June
INTRODUCTION: Pacemakers and implantable cardioverter-defibrillators (ICDs) are vulnerable to inappropriate sensing of electromagnetic interference (EMI), such as from nerve conduction studies. We conducted a prospective study to assess the safety of repetitive nerve stimulation (RNS).

METHODS: Fourteen patients undergoing insertion of 10 ICDs and 4 pacemakers under general anesthesia received RNS of the median, axillary, and spinal accessory nerves at 2 HZ and 50 HZ. We recorded detection of EMI and whether or not this resulted in an arrhythmia diagnosis or change in pacing output.

RESULTS: EMI was visible in 2 ICDs, without spurious tachyarrhythmia detection. EMI was observed in 3 of the 4 pacemakers, which led to pacing inhibition and a pause in 2, both of which were programmed to a unipolar sensing configuration.

CONCLUSIONS: RNS is safe in patients with ICDs. In pacemaker patients, RNS appears safe during bipolar sensing, but caution is recommended in pacemaker patients with unipolar sensing.

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