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Cerebral infarction in persistent pulmonary hypertension of the newborn
Insights
Electroencephalography (EEG) can detect brain injury in newborns with persistent pulmonary hypertension. This method, especially during paralysis, aids in identifying cerebrovascular lesions and guiding further imaging like CT scans.
Area of Science:
- Neonatal Neurology
- Neurophysiology
- Pediatric Critical Care
Background:
- Persistent pulmonary hypertension of the newborn (PPHN) is associated with hypoxemia, increasing the risk of hypoxic-ischemic brain injury.
- Intrapartum asphyxia is a significant factor in neonatal brain injury, particularly in infants with PPHN.
Purpose of the Study:
- To evaluate the utility of electroencephalography (EEG) in detecting major focal cerebral injury in infants with PPHN.
- To correlate EEG findings with documented cerebral infarction in this high-risk neonatal population.
Main Methods:
- A series of EEGs were analyzed in 19 infants diagnosed with PPHN.
- EEG findings, including voltage attenuation and seizure activity, were assessed for focal cerebral injury.
- Cranial sonograms, CT scans, or autopsy results were used to confirm cerebral infarction.
Main Results:
- Fifteen infants (78.9%) exhibited significant EEG abnormalities indicative of focal cerebral injury.
- Nine infants (47%) were diagnosed with cerebral infarction, confirmed by imaging or autopsy.
- Electrical seizures during muscle paralysis were observed in 89% of infants with confirmed infarction.
Conclusions:
- EEG is a valuable tool for detecting cerebrovascular lesions in neonates with PPHN, especially during muscle paralysis.
- Cranial CT is recommended for infants with persistent, focal EEG abnormalities to confirm and characterize cerebral infarction.
Abstract:
Persistent pulmonary hypertension of the newborn and its attendant hypoxemia may place the infant at high risk for hypoxic-ischemic injury. In 19 infants with persistent pulmonary hypertension of the newborn, 16 of whom suffered intrapartum asphyxia, we evaluated a series of electroencephalograms (EEGs) for evidence of major focal cerebral injury, ie, persistent voltage attenuation and/or focal electrical-seizure activity. Of the 15 infants (78.9%) with such EEG findings, nine infants (47% of the total population) had cerebral infarction documented by cranial sonograms, computed tomographic scans, or autopsy findings. In eight (89%) of the nine infants with infarction, electrical seizures were noted during periods of muscle paralysis. We recommend (1) the use of electroencephalography in this population, particularly during periods of muscle paralysis, to detect underlying cerebrovascular lesions and (2) the use of cranial computed tomography if persistent, focal EEG abnormalities are noted.