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Evidence map · VNS · refractory epilepsy

VNS for refractory epilepsy: what the research shows

Vagus nerve stimulation for refractory epilepsy. 2,111 papers from 1990 to 2026, including 52 meta-analyses, 72 systematic reviews and 65 randomised controlled trials. Each study below links to its source.

2,111Papers in the corpus
52Meta-analyses
65Randomised controlled trials
520Open-access papers

Study design

Jev labels
Meta-analysis52Systematic review72RCT65Non-randomised trial152Cohort375Case-control5Cross-sectional30Case series71

419 papers have no confident study-design label yet. Labels are AI-classified by Jev: advisory, not clinician-reviewed.

Papers over time

by publication year
713357 1990–942005–092025–26*

* 2025–26 is still in progress, so its count is incomplete.

Most-cited trials and reviews

by citations
  1. 1

    Vagus nerve stimulation therapy for partial-onset seizures: a randomized active-control trial.

    RCTHandforth et al. · 1998 · 706 citations
  2. 2

    Vagus nerve stimulation for treatment of partial seizures: 1. A controlled study of effect on seizures. First International Vagus Nerve Stimulation Study Group.

    RCTBen-Menachem et al. · 1994 · 475 citations
  3. 3

    A randomized controlled trial of chronic vagus nerve stimulation for treatment of medically intractable seizures. The Vagus Nerve Stimulation Study Group.

    RCT1995 · 357 citations
  4. 4

    Vagus nerve stimulation for epilepsy: a meta-analysis of efficacy and predictors of response.

    Meta-analysisEnglot et al. · 2011 · 333 citations
  5. 5

    Vagus nerve stimulation is associated with mood improvements in epilepsy patients.

    RCTElger et al. · 2000 · 195 citations
  6. 6

    Transcutaneous Vagus Nerve Stimulation (tVNS) for Treatment of Drug-Resistant Epilepsy: A Randomized, Double-Blind Clinical Trial (cMPsE02).

    RCTBauer et al. · 2016 · 191 citations
  7. 7

    Vagus nerve stimulation for treatment of partial seizures: 2. Safety, side effects, and tolerability. First International Vagus Nerve Stimulation Study Group.

    RCTRamsay et al. · 1994 · 175 citations
  8. 8

    The long-term effect of vagus nerve stimulation on quality of life in patients with pharmacoresistant focal epilepsy: the PuLsE (Open Prospective Randomized Long-term Effectiveness) trial.

    RCTRyvlin et al. · 2014 · 121 citations · Open access

Recent trials and reviews

last 3 years
  1. 1

    Seizure outcomes in persons with autism spectrum disorder undergoing epilepsy surgery: A systematic review and meta-analysis.

    Meta-analysisSubramaniam et al. · 2026 · 0 citations
  2. 2

    Right vagal nerve stimulation for epilepsy - case series and systematic review of the literature.

    Systematic reviewOng et al. · 2026 · 0 citations
  3. 3

    Efficacy of transcutaneous vagus nerve stimulation (t-VNS) in treating drug-resistant epilepsy: A systematic review and meta-analysis.

    Meta-analysisMakkawi et al. · 2025 · 3 citations
  4. 4

    Significant reduction of seizure frequency in patients with drug-resistant epilepsy by vagus nerve stimulation: Systematic review and meta-analysis.

    Meta-analysisMuniyandi et al. · 2025 · 2 citations
  5. 5

    Can transcutaneous auricular vagus nerve stimulation be considered a viable adjuntive therapy in drug-resistant epilepsy? A systematic review and meta-analysis of randomized controlled trials.

    Meta-analysisMoro et al. · 2025 · 2 citations

Decision support only. This page summarises published literature; it is not medical advice or a recommendation for any patient. Study designs and topic labels are AI-classified by Jev: advisory, not clinician-reviewed. Abstracts are not reproduced here: follow the links to read each source. Data snapshot 2026-09-25.