Role of EEG background activity, seizure burden and MRI in predicting neurodevelopmental outcome in full-term infants with hypoxic-ischaemic encephalopathy in the era of therapeutic hypothermia. (November 2016)

• Record Type: Journal Article
• Authors: Weeke, Lauren C.; Boylan, Geraldine B.; Pressler, Ronit M.; Hallberg, Boubou; Blennow, Mats; Toet, Mona C.; Groenendaal, Floris; de Vries, Linda S.
• Is Part Of: European journal of paediatric neurology. Volume 20:Number 6(2016:Nov.)
• Page Start: 855
• Page End: 864
• Publication Date: 2016-11
• Subjects: EEG -- Seizure burden -- MRI -- Neurodevelopmental outcome -- HIE -- Hypothermia; Pediatric neurology -- Periodicals; Nervous System Diseases -- Periodicals; Child -- Periodicals; Infant -- Periodicals; Neurologie pédiatrique -- Périodiques; Pediatric neurology; Electronic journals; Periodicals; Electronic journals; 618.928
• DOI: 10.1016/j.ejpn.2016.06.003
• Languages: English
• ISSNs: 1090-3798

Abstract

Abstract: Objective: To investigate the role of EEG background activity, electrographic seizure burden, and MRI in predicting neurodevelopmental outcome in infants with hypoxic-ischaemic encephalopathy (HIE) in the era of therapeutic hypothermia. Methods: Twenty-six full-term infants with HIE (September 2011–September 2012), who had video-EEG monitoring during the first 72 h, an MRI performed within the first two weeks and neurodevelopmental assessment at two years were evaluated. EEG background activity at age 24, 36 and 48 h, seizure burden, and severity of brain injury on MRI, were compared and related to neurodevelopmental outcome. Results: EEG background activity was significantly associated with neurodevelopmental outcome at 36 h (p = 0.009) and 48 h after birth (p = 0.029) and with severity of brain injury on MRI at 36 h (p = 0.002) and 48 h (p = 0.018). All infants with a high seizure burden and moderate-severe injury on MRI had an abnormal outcome. The positive predictive value (PPV) of EEG for abnormal outcome was 100% at 36 h and 48 h and the negative predictive value (NPV) was 75% at 36 h and 69% at 48 h. The PPV of MRI was 100% and the NPV 85%. The PPV of seizure burden was 78% and the NPV 71%. Conclusion: Severely abnormal EEG background activity at 36 h and 48 h after birth was associated with severe injury on MRI and abnormal neurodevelopmental outcome. High seizure burden was only associated with abnormal outcome in combination with moderate-severe injury on MRI. Highlights: MRI best predictor of outcome in infants with HIE, followed by EEG background activity at 36 and 48 h after birth. Assessment of seizure burden did not have additional predictive value. Severely abnormal EEG at 36 and 48 h associated with severe injury on MRI and abnormal outcome. High seizure burden only associated with abnormal outcome in combination with moderate-severe injury on MRI.