Electrographic seizure burden and outcomes following pediatric status epilepticus
Saptharishi Lalgudi Ganesan1, Cecil D Hahn2
1Department of Critical Care Medicine, The Hospital for Sick Children, University of Toronto, Toronto, Canada.
Insights
Pediatric status epilepticus in the ICU is linked to worse outcomes. Higher seizure burden in critically ill children correlates with poorer results, but causality requires further study.
Area of Science:
- Pediatric Neurology
- Critical Care Medicine
- Epileptology
Background:
- Pediatric status epilepticus poses significant risks for morbidity and mortality.
- The precise link between seizure burden, treatment, and patient outcomes is not fully understood.
- Critically ill children in the intensive care unit (ICU) offer a unique population for studying seizure burden.
Purpose of the Study:
- To review existing evidence on the association between seizure burden and outcomes in critically ill children.
- To explore the role of continuous electroencephalographic monitoring in quantifying seizure burden.
- To discuss the complexities and future research directions in this field.
Main Methods:
- Systematic review of observational studies focusing on critically ill children with status epilepticus.
- Analysis of data correlating seizure burden, quantified by continuous electroencephalographic monitoring, with patient outcomes.
- Consideration of confounding factors such as age, etiology, and illness severity.
Main Results:
- High-quality observational studies indicate a correlation between increased seizure burden and adverse outcomes in critically ill children.
- This association persists even after adjusting for key confounders.
- Continuous electroencephalographic monitoring enables accurate quantification of seizure burden in this population.
Conclusions:
- While evidence suggests seizure burden contributes to worse outcomes in pediatric status epilepticus, a definitive causal link is yet to be established.
- The relationship is complex, influenced by etiology, pre-existing conditions, medications, and genetics.
- Future research must meticulously measure and analyze these contributing factors to elucidate the seizure-outcome relationship.
Abstract:
Pediatric status epilepticus carries a substantial risk for morbidity and mortality, but the relationship between seizure burden, treatment, and outcome remains incompletely understood. This review summarizes the evidence linking seizure burden and outcomes among critically ill children in the intensive care unit (ICU), a population in whom accurate quantification of seizure burden is possible using continuous electroencephalographic monitoring. Several high-quality observational studies among critically ill children have reported an association between higher seizure burden and worse outcome, even after adjusting for potential confounders such as age, etiology, and illness severity. Although these studies support the hypothesis that seizures contribute to brain injury and worsen outcome, a causal link between seizures and outcome remains to be proven. The relationship between seizures and outcome is likely complex, and dependent on factors such as etiology, preexisting neurological disability, medication exposure, and possibly individual genetic factors. Studies attempting to define this complex relationship will need to measure and account for these factors in their analyses. This article is part of the Special Issue "Proceedings of the 7th London-Innsbruck Colloquium on Status Epilepticus and Acute Seizures".
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