Predictive Value of Revised ACNS Critical Care EEG Terminology for the Development of Non-convulsive Seizures
Abstract number :
2.011
Submission category :
3. Neurophysiology / 3B. ICU EEG
Year :
2022
Submission ID :
2204090
Source :
www.aesnet.org
Presentation date :
12/4/2022 12:00:00 PM
Published date :
Nov 22, 2022, 05:23 AM
Authors :
Cindy Luan, MD – The Ohio State University; Luis Sanchez-Iglesias, MD – The Ohio State University; Jaysingh Singh, MD – The Ohio State University
Rationale: Revised ACNS critical care EEG terminology was released in 2021 and currently remains the gold standard for EEG interpretation. We aimed to examine the predictive value of revised ACNS terminology as it relates to the development of non-convulsive seizures (NCS).
Methods: We conducted a retrospective review of continuous EEG studies from 367 patients undergoing continuous EEG monitoring due to suspicion for NCS. EEG data collected included background activity, presence of interictal epileptiform discharges, and the presence of rhythmic or periodic discharges.
Results: Regarding EEG background variables, only asymmetry demonstrated a significant correlation with development of NCS (p value=0.004). The presence of asymmetry frequently suggested the presence of an underlying structural abnormality such as trauma, stroke, bleed or tumor. Other variables such as continuity, reactivity, voltage and presence of AP gradient were not significantly associated with NCS. Similar to previous studies, LPDs (p value=0.008) and interictal discharges were also associated with NCS. The overall prevalence of NCS was 13%, similar to prior studies.
Conclusions: Among the new EEG variables introduced by revised ACNS critical care terminology, only asymmetry was significantly associated with NCS. Further prospective studies are needed to better characterize the prognostic value of various EEG patterns with respect to NCS.
Funding: None
Neurophysiology