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  • Oct. 19, 2011

    Transcranial magnetic stimulation offers hope treating depression

    By David Mrazek, M.D.

28 comments posted

At the Mayo Clinic, we continue to pursue research projects designed to improve the treatment of depression. When I read some of your stories, it's a strong incentive for us to keep working.

Need more help?
  • National Suicide Prevention Lifeline
    1-800-273-TALK (8255)
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  • National Alliance on Mental Illness
    www.nami.org
    1-800-950-NAMI (6264)

Much of our research has focused on how to more effectively select the right antidepressant for individuals. We've made some progress, but there's still too much uncertainty.

Perhaps the most frustrating problem is the reality that for a few of you, there's currently no antidepressant medication that will help. Clearly, it would be important to be able to identify who won't respond in order to save them from having to go through a discouraging series of medications that won't help.

Another big question: What alternative treatments might be effective for those who don't respond to medication? For more than 50 years, electroconvulsant therapy (ECT) has been an option. ECT works well for some, but it's expensive and often results in some memory loss. A newer option we've been studying is transcranial magnetic stimulation (TMS). One of the advantages of TMS therapy over ECT treatment is that there's no need to administer an anesthetic and there's no memory loss associated with the treatment.

The main problems with TMS have been that it may take up to six weeks for people to feel better and it's expensive. At the Mayo Clinic, we've been able to treat some people with TMS therapy who haven't responded to antidepressants. Our initial results are somewhat encouraging. Recently, I evaluated a research participant who had almost lost hope. Fortunately, he was willing to try TMS as part of our research protocol. While I tried to be optimistic, I was worried that since all of his other treatments had failed, the probability that TMS would help him was pretty low.

Fortunately, I was surprised and pleased to follow his progress.  He had steady but slow improvement in his symptoms on a week to week basis. After 6 weeks and 30 treatments, he had officially achieved a therapeutic response in his symptoms based on the criteria of the study. Of course, about half of our participants achieve a complete remission of their symptoms in eight weeks with a simple antidepressant. The difference between those who have a rapid recovery and those who struggle with depression for years is dramatic.

In the years ahead, we hope to be able to be able to examine the genomic profiles of our patients to be able to predict with a much higher degree of probability whether they'll respond to either treatment with an SSRI or TMS. I feel certain that eventually we'll achieve this goal, but we haven't yet.

28 comments posted

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