Cardiac arrest & resuscitation

Markers of neutrophil mediated inflammation associate with disturbed continuous electroencephalogram after out of hospital cardiac arrest

Acta Anaesthesiol ScandPublished Secondary analysis of the COMACARE randomised trial

Authors' conclusion

Elevated ICU admission levels of OPN and MPO predicted disturbances in cEEG during the subsequent 48 h after cardiac arrest.

Study context

Population
Unconscious, mechanically ventilated ICU-treated adult OHCA survivors with initial shockable rhythm
Participants
112 participants
Comparison
Poor vs good grade 48-hour cEEG by inflammatory biomarker levels
Primary endpoint
Disturbed 48-hour continuous EEG (cEEG grading) by ICU admission inflammatory biomarker levels
Follow-up
48 h
Methodological detailsobservational, post hoc sub-study
  • Observational
  • Post hoc sub-study

Primary result

As reported in the abstract

Poor grade 48-hour cEEG
Multivariable logistic regression
Estimate (95% CI)
Higher ICU admission OPN
OR 3.18 per ln[ng/ml](1.25–8.11)
Higher ICU admission MPO
OR 2.34(1.30–4.21)

Per ln[ng/ml], as printed

Higher osteopontin (OPN) at ICU admission associated with poor grade cEEG
P = 0.03
Higher myeloperoxidase (MPO) at ICU admission associated with poor grade cEEG
P < 0.01
Higher resistin at ICU admission associated with poor grade cEEG
P = 0.01

Further findings

Poor 6-month neurological outcome (CPC 3-5)

P < 0.001

Fixed effect of poor 6-month outcome on daily biomarker levels (ICU admission to 72 h)

Procalcitonin (PCT)
F = 7.7, p < .01
High-sensitivity C-reactive protein (hsCRP)
F = 4.0, p < .05
OPN
F = 5.6, p < .05

Independent prediction of poor 6-month outcome (model with 48-hour neurofilament light (NFL))

Biomarkers had no independent predictive value

Original publication

Markers of neutrophil mediated inflammation associate with disturbed continuous electroencephalogram after out of hospital cardiac arrest. Acta Anaesthesiol Scand. Published 12 September 2022. doi:10.1111/aas.14145

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