Symmetry of ictal slow waves may predict the outcomes of corpus callosotomy for epileptic spasms

We aimed to analyse the ictal electrographic changes on scalp electroencephalography (EEG), focusing on high-voltage slow waves (HVSs) in children with epileptic spasms (ES) and tonic spasms (TS) and then identified factors associated with corpus callosotomy (CC) outcomes. We enrolled 17 patients wi...

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Veröffentlicht in:Scientific reports 2019-12, Vol.9 (1), p.19733-7, Article 19733
Hauptverfasser: Kanai, Sotaro, Oguri, Masayoshi, Okanishi, Tohru, Itamura, Shinji, Baba, Shimpei, Nishimura, Mitsuyo, Homma, Yoichiro, Maegaki, Yoshihiro, Enoki, Hideo, Fujimoto, Ayataka
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container_title Scientific reports
container_volume 9
creator Kanai, Sotaro
Oguri, Masayoshi
Okanishi, Tohru
Itamura, Shinji
Baba, Shimpei
Nishimura, Mitsuyo
Homma, Yoichiro
Maegaki, Yoshihiro
Enoki, Hideo
Fujimoto, Ayataka
description We aimed to analyse the ictal electrographic changes on scalp electroencephalography (EEG), focusing on high-voltage slow waves (HVSs) in children with epileptic spasms (ES) and tonic spasms (TS) and then identified factors associated with corpus callosotomy (CC) outcomes. We enrolled 17 patients with ES/TS who underwent CC before 20 years of age. Post-CC Engel’s classification was as follows: I in 7 patients, II in 2, III in 4, and IV in 4. Welch’s t-test was used to analyse the correlation between ictal HVSs and CC outcomes based on the following three symmetrical indices: (1) negative peak delay: interhemispheric delay between negative peaks; (2) amplitude ratio: interhemispheric ratio of amplitude values for the highest positive peaks; and (3) duration ratio: interhemispheric ratio of slow wave duration. Ages at CC ranged from 17–237 months. Four to 15 ictal EEGs were analysed for each patient. The negative peak delay, amplitude ratio and duration ratio ranged from 0–530 ms, 1.00–7.40 and 1.00–2.74, respectively. The negative peak delay, amplitude ratio and duration ratio were significantly higher in the seizure residual group ( p  = 0.017,
doi_str_mv 10.1038/s41598-019-56303-3
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subjects 631/378/1689/178
692/617/375/178
Adolescent
Adult
Brain Waves
Cerebral hemispheres
Child
Child, Preschool
Corpus callosum
Corpus Callosum - physiopathology
Corpus Callosum - surgery
EEG
Epilepsy
Female
Humanities and Social Sciences
Humans
Infant
Infant, Newborn
Male
multidisciplinary
Science
Science (multidisciplinary)
Spasms, Infantile - physiopathology
Spasms, Infantile - surgery
Symmetry
title Symmetry of ictal slow waves may predict the outcomes of corpus callosotomy for epileptic spasms
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