Treating EEG Seizures in Hypoxic Ischemic Encephalopathy: A Randomized Controlled Trial

Area of Science:

• Neonatal neurology
• Pediatric critical care
• Neurodevelopmental disorders

Background:

• The impact of treating electrographic seizures in neonatal hypoxic ischemic encephalopathy (HIE) remains unclear.
• Early identification and management of seizures are crucial for improving outcomes in HIE.

Purpose of the Study:

• To investigate the effect of treating electrographic seizures alone versus clinical seizures on seizure burden and neurodevelopmental outcomes in neonates with HIE.

Main Methods:

• Randomized trial comparing treatment of electrographic seizures alone (ESG) versus clinical seizures (CSG) in neonates (≥36 weeks) with moderate to severe HIE.
• Continuous EEG monitoring for up to 96 hours to quantify electrographic seizure burden (SB).
• Assessment of brain injury severity via MRI and neurodevelopmental evaluation using the Bayley Scales of Infant and Toddler Development (BSID III) at 18-24 months.

Main Results:

• Treatment of electrographic seizures alone (ESG) resulted in a significantly lower median seizure burden (SB) compared to clinical seizure group (CSG) (P = .02).
• The ESG group experienced fewer seizures and shorter time to treatment (P = .04).
• Increased SB was significantly associated with more severe brain injury on MRI and lower BSID III performance scores across all domains (P < .03).

Conclusions:

• EEG monitoring and treatment of electrographic seizures in neonates with HIE significantly reduce seizure burden.
• Reduced seizure burden is associated with less severe brain injury and improved neurodevelopmental outcomes in infants with HIE.