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Does amplitude-integrated electroencephalogram background pattern correlate with cerebral injury in neonates with
Beth Padden1, Ianina Scheer, Barbara Brotschi
1Child Development Center, University Children's Hospital Zurich, Zurich, Switzerland.
Insights
Amplitude-integrated electroencephalogram (aEEG) background patterns predict brain injury in infants with hypoxic-ischaemic encephalopathy (HIE). However, therapeutic hypothermia may lessen this predictive association.
Area of Science:
- Neonatal Neurology
- Neuroimaging
- Clinical Neurophysiology
Background:
- Hypoxic-ischaemic encephalopathy (HIE) is a major cause of neonatal brain injury.
- Amplitude-integrated electroencephalogram (aEEG) is a bedside tool used to monitor brain function in neonates.
- Cerebral magnetic resonance imaging (MRI) provides detailed structural information about brain injury.
Purpose of the Study:
- To investigate the correlation between aEEG background patterns and cerebral MRI findings in infants with HIE.
- To assess the impact of therapeutic hypothermia on this correlation.
Main Methods:
- A cohort of 38 term-born infants with HIE was studied.
- Continuous aEEG monitoring was performed, with background patterns scored.
- Cerebral MRI was obtained and analyzed using a predefined scoring system for brain injury.
Main Results:
- Abnormal aEEG background patterns correlated with more severe cerebral injury on MRI in non-cooled infants.
- Infants treated with therapeutic hypothermia exhibited less severe cerebral injury compared to non-cooled infants.
- Therapeutic hypothermia appeared to attenuate the association between aEEG patterns and MRI-detected injury.
Conclusions:
- aEEG background patterns are predictive of cerebral MRI abnormalities in HIE.
- Therapeutic hypothermia may limit the predictive value of aEEG in assessing brain injury severity.
- Clinical interpretation of aEEG in cooled infants requires careful consideration of hypothermia's effects.
Aims:
To determine the correlation between amplitude-integrated electroencephalogram (aEEG) background pattern and cerebral magnetic resonance imaging (MRI) in infants with hypoxic-ischaemic encephalopathy (HIE) and to examine whether the correlation changes with therapeutic hypothermia.
Methods:
We included 38 term-born infants with HIE of whom 17 were cooled. All were continuously monitored with aEEG. Background pattern was scored at the beginning and the end of the recording. Cerebral MRI was obtained on median day 5 (2-11 days). Abnormalities were classified using a predefined scoring system for basal ganglia, watershed and overall injury, and then grouped into mild-moderate and severe.
Results:
Abnormal aEEG background pattern correlated with more severe cerebral injury on MRI in the non-cooled infants (P < 0.01). In addition, cooled infants had less severe cerebral injury than non-cooled infants, in particular on T2-weighted images (watershed P = 0.04 and total injury score = 0.07).
Conclusions:
Abnormal aEEG background pattern is predictive of abnormal MRI, but therapeutic hypothermia seems to reduce this association. Thus, when cooling is applied in a clinical setting, the predictive value of aEEG may be limited.
