British journal of neurosurgery · 2007
Thalamic deep brain stimulation in the treatment of essential tremor: a long-term follow-up.
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Blomstedt P, Hariz G-M, Hariz M I, Koskinen L-O D
Аннотация
Deep brain stimulation (DBS) of the nucleus ventralis intermedius thalami (Vim) in the treatment of essential tremor (ET) is well documented concerning the acute effects. Reports of the long-term effects are, however, few and the aim of the present study was to analyse the long-term efficacy of this treatment. Nineteen patients operated with unilateral Vim-DBS were evaluated with the Essential Tremor Rating Scale (ETRS) before surgery, and after a mean time of 1 and 7 years after surgery. The ETRS score for tremor of the contralateral hand was reduced from 6.8 at baseline to 1.2 and 2.7, respectively, on stimulation at follow-up. For hand function (item 11 - 14) the score was reduced from 12.7 to 4.1 and 8.2, respectively. Vim-DBS is an efficient treatment for ET, also after many years of treatment. There is, however, a decreasing effect over time, most noticeable concerning tremor of action.