Clinical trial Recruiting at 11 sites Observational Ages 18 and up

Assessing VNS Therapy for Difficult to Treat Depression

Official title: A Global PRospective, Multi-cEnter, ObServational Post-markeT Study tO Assess shoRt, Mid and Long-term Effectiveness and Efficiency of VNS Therapy® as Adjunctive Therapy in reaL-world patIents With diFficult to Treat dEpression.

Run by LivaNova · NCT03320304 · Data updated 2026-11-12

This study is testing if Vagus Nerve Stimulation therapy can help people with hard-to-treat depression feel better when other treatments haven't worked.

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment500 (estimated)
SponsorLivaNova
Industry-sponsored
Locations18 sites (Vienna and 17 other locations)
StatusRecruiting
StartedDecember 14, 2017
Main results expectedDecember 1, 2029
Study endsDecember 1, 2031
Registry record updatedAugust 27, 2026
Trial IDNCT03320304 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older with chronic or recurrent major depressive episodes that have not responded to multiple antidepressant treatments.

Probably not a fit

Patients who have not been diagnosed with treatment resistant depression or those who have not tried adequate antidepressant treatments may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the effectiveness and efficiency of Vagus Nerve Stimulation (VNS) Therapy in patients suffering from difficult to treat depression, specifically those with treatment resistant depression. It involves a real-world patient population diagnosed with chronic or recurrent major depressive episodes who have not responded adequately to standard treatments. A minimum of 500 patients will be implanted with a VNS Therapy System, and their clinical outcomes will be monitored over a follow-up period of 36 to 60 months. The study aims to gather data on short, mid, and long-term effects of this therapy as an adjunctive treatment.

Why it matters

Potential benefit: If successful, this study could provide a new treatment option for patients with difficult to treat depression, potentially improving their quality of life.

How similar studies have gone: Previous studies on VNS Therapy have shown promising results in treating depression, indicating that this approach has potential based on existing evidence.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Be at least 18 years of age.
* Have a documented primary diagnosis of chronic (\>2 years) or recurrent (2 or more prior episodes) major depressive episode that has not adequately responded to an adequate number of antidepressant treatments, as per local medical standards. This diagnosis must be confirmed using the MINI.
* Provide written Ethics Committee (EC) or Institutional Review Board (IRB) approved informed consent and Health Insurance Portability and Accountability Act (HIPAA, US only) authorization (as applicable according to local requirements).
* Currently is receiving at least one antidepressant treatment (i.e., antidepressant drug, maintenance electroconvulsive therapy, or formal psychotherapy including supportive psychotherapy) or mood stabilizing treatment for bipolar patients (such as lithium, anticonvulsants, or atypical antipsychotics).
* Able and willing to comply with the frequency of (outpatient) clinic visits and to reliably complete all the evaluations as specified in the study protocol.Hence based on the nature of their disease, the following patients should not be included: patients with mental retardation, current severe or significant substance/alcohol abuse, diagnosis of one or more schizophrenia-spectrum or other psychotic disorders, diagnosis of borderline or severe personality disorder as determined by clinical judgment which, in the investigator's opinion, would significantly interfere with subject's participation in the study)

Exclusion Criteria:

There are no exclusion criteria; the investigator should refer to the (local applicable) VNS Therapy Physician's Manual.

Where it's running

  • AKH Allgemeines Krankenhaus der Stadt Wien
    Vienna, Austria
    Recruiting
  • KU Leuven
    Leuven, Belgium
    Recruiting
  • Universitätsklinikum Bonn
    Bonn, Germany
    Recruiting
  • Universitätsklinikum Köln
    Cologne, Germany
    Recruiting
  • LVR-Hospital Essen
    Essen, Germany
    Recruiting
  • Universitätsklinikum Frankfurt
    Frankfurt, Germany
    Recruiting
Show 12 more locations
  • Universitätsklinik Leipzig
    Leipzig, Germany
    Recruiting
  • University Hospital Münster
    Münster, Germany
    Recruiting
  • Glenfield hospital
    Leicester, United Kingdom
    Recruiting
  • King's College London
    London, United Kingdom
    Recruiting
  • Academic Psychiatry Wolfson Research Centre
    Newcastle upon Tyne, United Kingdom
    Recruiting
  • Sozialstiftung Bamberg - Klinikum am Bruderwald
    Bamberg, Germany
    Withdrawn
  • Universitätsklinikum Freiburg
    Freiburg im Breisgau, Germany
    Completed
  • Universitätsmedizin Göttingen
    Göttingen, Germany
    Withdrawn
  • Medizinische Hochschule Hannover
    Hanover, Germany
    Withdrawn
  • Universitätsklinikum Jena
    Jena, Germany
    Completed
  • Klinikum Wilhelmshaven
    Wilhelmshaven, Germany
    Active not recruiting
  • Mendip HTT / St Andrew's Ward
    Wells, United Kingdom
    Active not recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.