Assessment of the duration of continuous EEG monitoring in aneurysmal subarachnoid hemorrhage.
6 affiliations
- 1The Permanente Medical Group, Department of Neurosurgery, Kaiser Sacramento Medical Center, Sacramento, CA, United States.
- 2Departments of Neurology, Neurosurgery and Anesthesiology and Critical Care Medicine, Johns Hopkins University, Baltimore, MD, United States.
- 3Department of Neurology, Hospital for Special Surgery, New York, NY, United States.
- 4Department of Neurology, Johns Hopkins University, Baltimore, MD, United States.
- 5Department of Neurology, Tufts Medical Center, Boston, MA, United States.
- 6Departments of Neurology and Anesthesiology & Critical Care Medicine, Johns Hopkins University, Baltimore, MD, United States.
Abstract
Electroencephalography (EEG) can detect seizures and delayed cerebral ischemia (DCI) in patients with aneurysmal subarachnoid hemorrhage (aSAH). Because a standard duration of continuous EEG monitoring to capture these complications has not been established in aSAH, we compared a standard 6- or 7-day cEEG monitoring protocol versus longer periods of monitoring. We performed a retrospective analysis of aSAH patients ≥18 years old grouped by standard monitoring protocol (6-7 days, group 1) and those with longer monitoring (>7 days, group 2). Clinical characteristics, EEG features, length of stay (LOS) and functional outcome were compared using univariate analyses. Multivariable analyses tested the association between the groups and vasospasm, DCI, LOS, and modified Rankin Scale (mRS). 19 patients met criteria for group 1 and 16 patients for group 2. We found no difference in EEG's detection of worsening abnormal EEG activity, vasospasm and DCI. ICU and hospital LOS in group 2 were nearly double that of group 1 (ICU: 25.5 (19.5-35) vs. 14 (11-21) days, p = 0.0003; hospital: 32.5 (29.5-48) vs. 18 (13-29) days, p = 0.003). Good outcome (mRS ≤2) at discharge and at 6 months was similar in both groups (21.1% vs. 0% and 56.3% vs. 46.2%). In multivariable analysis, EEG duration was independently associated with ICU and hospital LOS but not with vasospasm, DCI, and mRS at 6 months. Longer EEG monitoring correlated with significantly longer ICU and hospital LOS but not with vasospasm, DCI, and functional outcome at 6 months. Larger studies to confirm our findings are warranted.
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BibTeX
@article{solnicky2026assessment,
title = {{Assessment of the duration of continuous EEG monitoring in aneurysmal subarachnoid hemorrhage.}},
author = {Veronika Solnicky and J Ricardo Carhuapoma and Jose I Suarez and Robert D Stevens and Eva K Ritzl and Sarah E Nelson},
journal = {Frontiers in medicine},
year = {2026},
month = oct,
doi = {10.3389/fmed.2026.1922482},
url = {https://europepmc.org/article/MED/42952828},
note = {CC BY},
}
RIS
TY - JOUR
TI - Assessment of the duration of continuous EEG monitoring in aneurysmal subarachnoid hemorrhage.
AU - Veronika Solnicky
AU - J Ricardo Carhuapoma
AU - Jose I Suarez
AU - Robert D Stevens
AU - Eva K Ritzl
AU - Sarah E Nelson
PY - 2026
DA - 2026/10/14
JO - Frontiers in medicine
DO - 10.3389/fmed.2026.1922482
UR - https://europepmc.org/article/MED/42952828
AB - Electroencephalography (EEG) can detect seizures and delayed cerebral ischemia (DCI) in patients with aneurysmal subarachnoid hemorrhage (aSAH). Because a standard duration of continuous EEG monitoring to capture these complications has not been established in aSAH, we compared a standard 6- or 7-day cEEG monitoring protocol versus longer periods of monitoring. We performed a retrospective analysis of aSAH patients ≥18 years old grouped by standard monitoring protocol (6-7 days, group 1) and those with longer monitoring (>7 days, group 2). Clinical characteristics, EEG features, length of stay (LOS) and functional outcome were compared using univariate analyses. Multivariable analyses tested the association between the groups and vasospasm, DCI, LOS, and modified Rankin Scale (mRS). 19 patients met criteria for group 1 and 16 patients for group 2. We found no difference in EEG's detection of worsening abnormal EEG activity, vasospasm and DCI. ICU and hospital LOS in group 2 were nearly double that of group 1 (ICU: 25.5 (19.5-35) vs. 14 (11-21) days, p = 0.0003; hospital: 32.5 (29.5-48) vs. 18 (13-29) days, p = 0.003). Good outcome (mRS ≤2) at discharge and at 6 months was similar in both groups (21.1% vs. 0% and 56.3% vs. 46.2%). In multivariable analysis, EEG duration was independently associated with ICU and hospital LOS but not with vasospasm, DCI, and mRS at 6 months. Longer EEG monitoring correlated with significantly longer ICU and hospital LOS but not with vasospasm, DCI, and functional outcome at 6 months. Larger studies to confirm our findings are warranted.
SN - 2296-858X
ER -