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Vagus nerve stimulation therapy randomized to different amounts of electrical charge for treatment-resistant depression: acute and chronic effects.

Publication ,  Journal Article
Aaronson, ST; Carpenter, LL; Conway, CR; Reimherr, FW; Lisanby, SH; Schwartz, TL; Moreno, FA; Dunner, DL; Lesem, MD; Thompson, PM; Husain, M ...
Published in: Brain Stimul
July 2013

BACKGROUND: Major depressive disorder is a prevalent, disabling, and often chronic or recurrent psychiatric condition. About 35% of patients fail to respond to conventional treatment approaches and are considered to have treatment-resistant depression (TRD). OBJECTIVE: We compared the safety and effectiveness of different stimulation levels of adjunctive vagus nerve stimulation (VNS) therapy for the treatment of TRD. METHODS: In a multicenter, double blind study, 331 patients with TRD were randomized to one of three dose groups: LOW (0.25 mA current, 130 μs pulse width), MEDIUM (0.5-1.0 mA, 250 μs), or HIGH (1.25-1.5 mA, 250 μs). A highly treatment-resistant population (>97% had failed to respond to ≥6 previous treatments) was enrolled. Response and adverse effects were assessed for 22 weeks (end of acute phase), after which output current could be increased, if clinically warranted. Assessments then continued until Week 50 (end of long-term phase). RESULTS: VNS therapy was well tolerated. During the acute phase, all groups showed statistically significant improvement on the primary efficacy endpoint (change in Inventory of Depressive Symptomatology-Clinician Administered Version [IDS-C]), but not for any between-treatment group comparisons. In the long-term phase, mean change in IDS-C scores showed continued improvement. Post-hoc analyses demonstrated a statistically significant correlation between total charge delivered per day and decreasing depressive symptoms; and analysis of acute phase responders demonstrated significantly greater durability of response at MEDIUM and HIGH doses than at the LOW dose. CONCLUSIONS: TRD patients who received adjunctive VNS showed significant improvement at study endpoint compared with baseline, and the effect was durable over 1 year. Higher electrical dose parameters were associated with response durability.

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Published In

Brain Stimul

DOI

EISSN

1876-4754

Publication Date

July 2013

Volume

6

Issue

4

Start / End Page

631 / 640

Location

United States

Related Subject Headings

  • Vagus Nerve Stimulation
  • Treatment Outcome
  • Neurology & Neurosurgery
  • Middle Aged
  • Male
  • Humans
  • Female
  • Double-Blind Method
  • Depressive Disorder, Treatment-Resistant
  • Adult
 

Citation

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Aaronson, S. T., Carpenter, L. L., Conway, C. R., Reimherr, F. W., Lisanby, S. H., Schwartz, T. L., … Bunker, M. (2013). Vagus nerve stimulation therapy randomized to different amounts of electrical charge for treatment-resistant depression: acute and chronic effects. Brain Stimul, 6(4), 631–640. https://doi.org/10.1016/j.brs.2012.09.013
Aaronson, Scott T., Linda L. Carpenter, Charles R. Conway, Frederick W. Reimherr, Sarah H. Lisanby, Thomas L. Schwartz, Francisco A. Moreno, et al. “Vagus nerve stimulation therapy randomized to different amounts of electrical charge for treatment-resistant depression: acute and chronic effects.Brain Stimul 6, no. 4 (July 2013): 631–40. https://doi.org/10.1016/j.brs.2012.09.013.
Aaronson ST, Carpenter LL, Conway CR, Reimherr FW, Lisanby SH, Schwartz TL, et al. Vagus nerve stimulation therapy randomized to different amounts of electrical charge for treatment-resistant depression: acute and chronic effects. Brain Stimul. 2013 Jul;6(4):631–40.
Aaronson, Scott T., et al. “Vagus nerve stimulation therapy randomized to different amounts of electrical charge for treatment-resistant depression: acute and chronic effects.Brain Stimul, vol. 6, no. 4, July 2013, pp. 631–40. Pubmed, doi:10.1016/j.brs.2012.09.013.
Aaronson ST, Carpenter LL, Conway CR, Reimherr FW, Lisanby SH, Schwartz TL, Moreno FA, Dunner DL, Lesem MD, Thompson PM, Husain M, Vine CJ, Banov MD, Bernstein LP, Lehman RB, Brannon GE, Keepers GA, O’Reardon JP, Rudolph RL, Bunker M. Vagus nerve stimulation therapy randomized to different amounts of electrical charge for treatment-resistant depression: acute and chronic effects. Brain Stimul. 2013 Jul;6(4):631–640.
Journal cover image

Published In

Brain Stimul

DOI

EISSN

1876-4754

Publication Date

July 2013

Volume

6

Issue

4

Start / End Page

631 / 640

Location

United States

Related Subject Headings

  • Vagus Nerve Stimulation
  • Treatment Outcome
  • Neurology & Neurosurgery
  • Middle Aged
  • Male
  • Humans
  • Female
  • Double-Blind Method
  • Depressive Disorder, Treatment-Resistant
  • Adult