Electrocorticographic events from long-term ambulatory brain recordings can potentially supplement seizure diaries.

Abstract:

PURPOSE:To determine the feasibility of using epileptiform events detected by continuous electrocorticographic monitoring via a brain-responsive neurostimulation system to supplement patient-maintained seizure diaries. METHODS:Data were retrospectively analyzed from a randomized controlled trial of brain-responsive neurostimulation (RNS® System) for adjunctive treatment of medically intractable focal onset seizures in 191 subjects. The long-term (≥3 months) correspondence between daily counts of diary-reported seizures and device-recorded "long epileptiform events" (LEs), a proxy for electrographic seizures (ESs), was assessed using cross-correlation and logistic generalized estimating equation models. RESULTS:Diary-reported seizures and LEs significantly co-varied across days in 124 patients whose detection settings were held constant, with a significantly higher correlation in 54 patients (44 %) whose LEs were usually ESs (high concordance patients). There were more days in which LEs were detected than days in which patients reported a seizure (positive predictive value (PPV): 34 %). On days when there were no LEs, there were typically no diary-reported seizures (negative predictive value (NPV): 90 %). In patients with a high concordance between LEs and ESs, the PPV and NPV were both slightly higher, 43 % (35-52 %) and 93 % (95 % CI: 86-97 %) respectively. CONCLUSION:Although LEs can substantially outnumber diary reported seizures, the high across-day correlation and strong NPV between LEs and diary seizures suggests that LEs recorded by the RNS® System could potentially supplement seizure diaries by providing an objective biomarker for relative seizure burden.

journal_name

Epilepsy Res

journal_title

Epilepsy research

authors

Quigg M,Skarpaas TL,Spencer DC,Fountain NB,Jarosiewicz B,Morrell MJ

doi

10.1016/j.eplepsyres.2020.106302

subject

Has Abstract

pub_date

2020-03-01 00:00:00

pages

106302

eissn

0920-1211

issn

1872-6844

pii

S0920-1211(19)30552-2

journal_volume

161

pub_type

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