Key result
In patients with severe acute brain injury, heart rate variability progressively declined starting the day before neurological deterioration and was significantly inversely correlated with EEG suppression ratio.
Why the study?
Decreases in heart rate variability are linked to poor outcomes in severe acute brain injury, but whether these changes precede neurological deterioration was unknown.
Population
25 patients with neurological deterioration after severe acute brain injury
Design
Retrospective analysis
Authors
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Declining HRV may herald neurological deterioration in severe brain injury; leaves open whether monitoring improves outcomes.
Observational (n=25)
No
Effect estimate: rs = -0.692
p-value: p=<0.001
Continuous heart rate variability monitoring, combined with EEG, may facilitate the early detection of secondary brain damage progression before irreversible injury occurs in patients with severe acute brain injury.
Lee et al. (2021) conducted an observational in Severe acute brain injury (n=25). Neurological deterioration was evaluated on Correlation between EEG suppression ratio and very low frequency (VLF) power (rs = -0.692, p=<0.001). In patients with severe acute brain injury, heart rate variability progressively declined starting the day before neurological deterioration and was significantly inversely correlated with EEG suppression ratio.
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