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EEG for good outcome prediction after cardiac arrest : A multicentre cohort study

Turella, S. LU ; Dankiewicz, J. LU orcid ; Ben-Hamouda, N. ; Nilsen, K. B. ; Düring, J. LU orcid ; Endisch, C. ; Engstrøm, M. ; Flügel, D. ; Gaspard, N. and Grejs, A. M. , et al. (2024) In Resuscitation 202.
Abstract

Aim: Assess the prognostic ability of a non-highly malignant and reactive EEG to predict good outcome after cardiac arrest (CA). Methods: Prospective observational multicentre substudy of the “Targeted Hypothermia versus Targeted Normothermia after Out-of-hospital Cardiac Arrest Trial”, also known as the TTM2-trial. Presence or absence of highly malignant EEG patterns and EEG reactivity to external stimuli were prospectively assessed and reported by the trial sites. Highly malignant patterns were defined as burst-suppression or suppression with or without superimposed periodic discharges. Multimodal prognostication was performed 96 h after CA. Good outcome at 6 months was defined as a modified Rankin Scale score of 0–3. Results: 873... (More)

Aim: Assess the prognostic ability of a non-highly malignant and reactive EEG to predict good outcome after cardiac arrest (CA). Methods: Prospective observational multicentre substudy of the “Targeted Hypothermia versus Targeted Normothermia after Out-of-hospital Cardiac Arrest Trial”, also known as the TTM2-trial. Presence or absence of highly malignant EEG patterns and EEG reactivity to external stimuli were prospectively assessed and reported by the trial sites. Highly malignant patterns were defined as burst-suppression or suppression with or without superimposed periodic discharges. Multimodal prognostication was performed 96 h after CA. Good outcome at 6 months was defined as a modified Rankin Scale score of 0–3. Results: 873 comatose patients at 59 sites had an EEG assessment during the hospital stay. Of these, 283 (32%) had good outcome. EEG was recorded at a median of 69 h (IQR 47–91) after CA. Absence of highly malignant EEG patterns was seen in 543 patients of whom 255 (29% of the cohort) had preserved EEG reactivity. A non-highly malignant and reactive EEG had 56% (CI 50–61) sensitivity and 83% (CI 80–86) specificity to predict good outcome. Presence of EEG reactivity contributed (p < 0.001) to the specificity of EEG to predict good outcome compared to only assessing background pattern without taking reactivity into account. Conclusion: Nearly one-third of comatose patients resuscitated after CA had a non-highly malignant and reactive EEG that was associated with a good long-term outcome. Reactivity testing should be routinely performed since preserved EEG reactivity contributed to prognostic performance.

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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cardiac arrest, Coma, EEG, Outcome, Prognosis, Reactivity
in
Resuscitation
volume
202
article number
110319
publisher
Elsevier
external identifiers
  • pmid:39029579
  • scopus:85199946221
ISSN
0300-9572
DOI
10.1016/j.resuscitation.2024.110319
language
English
LU publication?
yes
id
58d1e9d9-d0b0-4a9f-a26b-08d0fd8c0491
date added to LUP
2024-12-02 09:52:11
date last changed
2025-07-01 03:11:31
@article{58d1e9d9-d0b0-4a9f-a26b-08d0fd8c0491,
  abstract     = {{<p>Aim: Assess the prognostic ability of a non-highly malignant and reactive EEG to predict good outcome after cardiac arrest (CA). Methods: Prospective observational multicentre substudy of the “Targeted Hypothermia versus Targeted Normothermia after Out-of-hospital Cardiac Arrest Trial”, also known as the TTM2-trial. Presence or absence of highly malignant EEG patterns and EEG reactivity to external stimuli were prospectively assessed and reported by the trial sites. Highly malignant patterns were defined as burst-suppression or suppression with or without superimposed periodic discharges. Multimodal prognostication was performed 96 h after CA. Good outcome at 6 months was defined as a modified Rankin Scale score of 0–3. Results: 873 comatose patients at 59 sites had an EEG assessment during the hospital stay. Of these, 283 (32%) had good outcome. EEG was recorded at a median of 69 h (IQR 47–91) after CA. Absence of highly malignant EEG patterns was seen in 543 patients of whom 255 (29% of the cohort) had preserved EEG reactivity. A non-highly malignant and reactive EEG had 56% (CI 50–61) sensitivity and 83% (CI 80–86) specificity to predict good outcome. Presence of EEG reactivity contributed (p &lt; 0.001) to the specificity of EEG to predict good outcome compared to only assessing background pattern without taking reactivity into account. Conclusion: Nearly one-third of comatose patients resuscitated after CA had a non-highly malignant and reactive EEG that was associated with a good long-term outcome. Reactivity testing should be routinely performed since preserved EEG reactivity contributed to prognostic performance.</p>}},
  author       = {{Turella, S. and Dankiewicz, J. and Ben-Hamouda, N. and Nilsen, K. B. and Düring, J. and Endisch, C. and Engstrøm, M. and Flügel, D. and Gaspard, N. and Grejs, A. M. and Haenggi, M. and Haffey, S. and Imbach, L. and Johnsen, B. and Kemlink, D. and Leithner, C. and Legriel, S. and Lindehammar, H. and Mazzon, G. and Nielsen, N. and Peyre, A. and Ribalta Stanford, B. and Roman-Pognuz, E. and Rossetti, A. O. and Schrag, C. and Valeriánová, A. and Wendel-Garcia, P. and Zubler, F. and Cronberg, T. and Westhall, E.}},
  issn         = {{0300-9572}},
  keywords     = {{Cardiac arrest; Coma; EEG; Outcome; Prognosis; Reactivity}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Resuscitation}},
  title        = {{EEG for good outcome prediction after cardiac arrest : A multicentre cohort study}},
  url          = {{http://dx.doi.org/10.1016/j.resuscitation.2024.110319}},
  doi          = {{10.1016/j.resuscitation.2024.110319}},
  volume       = {{202}},
  year         = {{2024}},
}