Long-term efficacy of repeated daily prefrontal transcranial magnetic stimulation (TMS) in treatmnt-resistant depression

Antonio Mantovani, Martina Pavlicova, David Avery, Ziad Nahas, William M. McDonald, Chandra D. Wajdik, Paul E. Holtzheimer, Mark S. George, Harold A. Sackeim, Sarah H. Lisanby

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43 Scopus citations

Abstract

Background A few studies have examined the durability of transcranial magnetic stimulation (TMS) antidepressant benefit once patients remitted. This study examined the long-term durability of clinical benefit from TMS using a protocol-specified TMS taper and either continuation pharmacotherapy or naturalistic follow-up. Methods Patients were remitters from an acute double-blind sham-controlled trial of TMS (n = 18), or from an open-label extension in patients who did not respond to the acute trial (n = 43). Long-term durability of TMS acute effect was examined in remitters over a 12-week follow-up. Relapse, defined as 24-item Hamilton Depression Rating Scale (HDRS-24) ≥20, was the primary outcome. Results Of 61 remitters in the acute trial, five entered naturalistic follow-up and 50 entered the TMS taper. Thirty-two patients completed TMS taper and 1-, 2-, and 3-month follow-up. At 3-month visit, 29 of 50 (58%) were classified as in remission (HDRS-24 ≤10), two of 50 (4%) as partial responders (30%a;circ HDRS-24 reduction <50% from baseline), and one of 50 (2%) met criteria for relapse. During the entire 3-month follow-up, five of the 37 patients relapsed (relapse rate = 13.5%), but four of them regained remission by the end of the study. The average time to relapse in these five patients was 7.2 ± 3.3 weeks. Patients who relapsed had higher depression scores at 1 month. Conclusions While one third of the sample was lost to follow-up, our results demonstrate that most patients contributing to observations experienced persistence of benefit from TMS followed by pharmacotherapy or no medication. Longer follow-up and more rigorous studies are needed to explore the true long-term durability of remission produced by TMS.

Original languageEnglish (US)
Pages (from-to)883-890
Number of pages8
JournalDepression and Anxiety
Volume29
Issue number10
DOIs
StatePublished - Oct 2012

Keywords

  • depression
  • efficacy
  • follow-up
  • transcranial magnetic stimulation
  • treatment-resistant

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