Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
Pallidal deep brain stimulation for tardive dystonia: meta-analysis of clinical outcomes.
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Grabel Michael, Merola Aristide
Аннотация
INTRODUCTION: Tardive dystonia (TD) is a disabling complication of pharmacological therapy with dopaminergic receptor antagonists, usually resistant to oral medications. Several reports have shown that deep brain stimulation (DBS) of the globus pallidus pars interna (GPi) might be effective in TD, but the overall level of evidence remains limited to case reports or small case series.
OBJECTIVES: We sought to summarize the collective evidence in support of GPi-DBS for TD using a meta-analytic approach.
METHODS: We searched PubMed for human studies reporting tardive dystonia cases treated with GPi-DBS that reported the validated Burke-Fahn-Marsden Dystonia Rating Scale (BFMDRS) as outcome measure. Data extracted were reviewed for risk of bias. Then, through linear mixed effects modeling of the percent improvement seen on an individual level, we estimated the average improvement effect varying by study.
RESULTS: The searching strategy resulted in a total of n = 78 studies, which were screened for eligibility criteria resulting in the inclusion of n = 14 studies, yielding 134 TD patients for the final analyses. The overall estimate improvement in the BFMDRS after GPi-DBS was 66.88 ± 11.96%. The review of individual case reports indicated rare worsening (n = 4) or lack of improvement (n = 3) following GPi-DBS.
CONCLUSIONS: Bilateral GPi-DBS can be an effective therapeutic option for severe cases of TD resistant to oral pharmacological therapies, even though rare cases of symptom worsening or lack of improvement have also been reported.
OBJECTIVES: We sought to summarize the collective evidence in support of GPi-DBS for TD using a meta-analytic approach.
METHODS: We searched PubMed for human studies reporting tardive dystonia cases treated with GPi-DBS that reported the validated Burke-Fahn-Marsden Dystonia Rating Scale (BFMDRS) as outcome measure. Data extracted were reviewed for risk of bias. Then, through linear mixed effects modeling of the percent improvement seen on an individual level, we estimated the average improvement effect varying by study.
RESULTS: The searching strategy resulted in a total of n = 78 studies, which were screened for eligibility criteria resulting in the inclusion of n = 14 studies, yielding 134 TD patients for the final analyses. The overall estimate improvement in the BFMDRS after GPi-DBS was 66.88 ± 11.96%. The review of individual case reports indicated rare worsening (n = 4) or lack of improvement (n = 3) following GPi-DBS.
CONCLUSIONS: Bilateral GPi-DBS can be an effective therapeutic option for severe cases of TD resistant to oral pharmacological therapies, even though rare cases of symptom worsening or lack of improvement have also been reported.