Jonah Fox , Yunting Yu , Dario J. Englot , Paddy Ssentongo , Alain Lekoubou
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Abstract
Objective
To perform a systematic review and meta-analysis to evaluate the association between stimulation-induced seizures and favorable surgical outcomes in drug-resistant epilepsy patients.
Methods
A search was conducted using PubMed, Cochrane and Embase databases to identify relevant studies. The prevalence of stimulation-induced seizures and the association between them and favorable surgical outcomes were assessed using a random effects model. A narrative review was also performed. If a patient achieved either Engel I or ILAE class 1 or 2 they were considered to have had a favorable surgical outcome. A minimum of 12 months of follow-up time was required.
Results
Only three studies met criteria to be included in the meta-analysis and over half the patients came from a single study. The pooled prevalence of stimulation-induced seizures was 59.2% (95% CI, 41.5–74.9). There was a trend towards a significant association between stimulation-induced seizures and favorable surgical outcomes in patients who received resection irrespective of stimulation settings, but it did not reach statistical significance (RR: 1.76, 95% CI 0.96–3.23). The narrative review suggested that low frequency stimulation may be less sensitive but more specific compared to high frequency stimulation for producing typical seizures and may be more predictive of surgical outcomes.
Conclusions
Stimulation-induced seizures were not statistically associated with surgical outcomes, but our meta-analysis was limited to a small number of studies and pooled results at both high and low frequency stimulation. Low frequency stimulation induced seizures were more consistently associated with favorable surgical outcomes in patients who had resection compared to high frequency stimulation induced seizures.
期刊介绍:
Epilepsy & Behavior is the fastest-growing international journal uniquely devoted to the rapid dissemination of the most current information available on the behavioral aspects of seizures and epilepsy.
Epilepsy & Behavior presents original peer-reviewed articles based on laboratory and clinical research. Topics are drawn from a variety of fields, including clinical neurology, neurosurgery, neuropsychiatry, neuropsychology, neurophysiology, neuropharmacology, and neuroimaging.
From September 2012 Epilepsy & Behavior stopped accepting Case Reports for publication in the journal. From this date authors who submit to Epilepsy & Behavior will be offered a transfer or asked to resubmit their Case Reports to its new sister journal, Epilepsy & Behavior Case Reports.