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Letter to the Editor| Volume 7, ISSUE 6, P914-916, November 2014

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Long Term Effects of Low Frequency (10 Hz) Vagus Nerve Stimulation on EEG and Heart Rate Variability in Crohn's Disease: A Case Report

Published:August 06, 2014DOI:https://doi.org/10.1016/j.brs.2014.08.001
      We report the first clinical case of long-term low frequency vagus nerve stimulation (VNS) in a patient with Crohn's disease (CD), a chronic inflammatory disorder characterized by relapsing and remitting periods of gastrointestinal inflammation [
      • Bonaz B.L.
      • Bernstein C.N.
      Brain-gut interactions in inflammatory bowel disease.
      ]. There is no definitive cure of CD and there is a strong need for an efficient treatment inducing sustained remission. We have shown, in an experimental model of CD, that chronic low frequency VNS activates the cholinergic anti-inflammatory pathway through vagal efferents [
      • Meregnani J.
      • Clarencon D.
      • Vivier M.
      • et al.
      Anti-inflammatory effect of vagus nerve stimulation in a rat model of inflammatory bowel disease.
      ]. VNS is thus a therapeutic option for CD though it has only been used at high frequency in epilepsy and depression [
      • Beekwilder J.P.
      • Beems T.
      Overview of the clinical applications of vagus nerve stimulation.
      ]. Long-term low frequency (10 Hz) VNS has never been tested in CD and its central effect remains unknown. Here, we share our first evaluation of the effect of 10 Hz VNS in CD on both brain and parasympathetic nervous system.
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