Observations on the use of vagus nerve stimulation earlier in the course of pharmacoresistant epilepsy: Patients with seizures for six years or less

Sandra L. Helmers, David A. Griesemer, J. Christine Dean, Jorge D. Sanchez, Douglas Labar, Jerome V. Murphy, David Bettis, Yong D. Park, Robert M. Shuman, George L. Morris

Research output: Contribution to journalReview article

33 Scopus citations

Abstract

BACKGROUND - This study retrospectively compared the effectiveness of vagus nerve stimulation (VNS) therapy among a constant cohort of patients in the patient outcome registry, which systematically monitors outcomes of patients receiving VNS therapy. Patients in the study had pharmacoresistant seizures for 6 years or less (early treatment group) or more than 6 years (late treatment group) before initiation of VNS therapy, and results are provided after both 3 and 12 months. REVIEW SUMMARY - Of 405 patients, 51 were in the early and 354 in the late treatment groups. Median age at onset of seizures was 7 years in the early and 4.5 years in the late treatment group. Seizure reduction of 100% was reported in 7.8% (early) and 3.7% (late) patients at 3 months and 11.8% (early) and 4.5% (late) at 12 months (P = 0.033). Reductions in seizure frequency greater than or equal to 90% for early and late treatment groups were similar: 11.8% (early) and 11.0% (late) at 3 months and 23.5% (early) and 17.0% (late) at 12 months. CONCLUSIONS - Patients treated earlier with VNS therapy were twice as likely to report no seizures as patients who had seizures for more than 6 years before they received VNS therapy. The effectiveness of VNS therapy should be assessed among other patients with pharmacoresistant seizures and lesser cumulative seizure loads.

Original languageEnglish (US)
Pages (from-to)160-164
Number of pages5
JournalNeurologist
Volume9
Issue number3
DOIs
StatePublished - May 1 2003

Keywords

  • Database
  • Epilepsy
  • Registry
  • Seizures
  • Vagus nerve stimulation therapy

ASJC Scopus subject areas

  • Clinical Neurology

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    Helmers, S. L., Griesemer, D. A., Dean, J. C., Sanchez, J. D., Labar, D., Murphy, J. V., Bettis, D., Park, Y. D., Shuman, R. M., & Morris, G. L. (2003). Observations on the use of vagus nerve stimulation earlier in the course of pharmacoresistant epilepsy: Patients with seizures for six years or less. Neurologist, 9(3), 160-164. https://doi.org/10.1097/00127893-200305000-00004