Hypothermic neuroprotection is associated with recovery of spectral edge frequency after asphyxia in preterm fetal sheep

Guido Wassink, Robert D. Barrett, Joanne O. Davidson, Laura Bennet, Robert Galinsky, Michael Dragunow, Alistair J. Gunn

Research output: Contribution to journalArticleResearchpeer-review

Abstract

BACKGROUND AND PURPOSE - : Electroencephalographic recovery is predictive of outcome after perinatal hypoxia-ischemia, but it is unknown whether early changes in electroencephalographic can predict the response to therapeutic hypothermia in the preterm brain. METHODS - : 0.7 gestation fetal sheep received umbilical cord occlusion or sham occlusion for 25 minutes, followed by sham hypothermia or whole-body cooling started either 30 minutes or 5 hours after occlusion and continued for 72 hours. RESULTS - : Early but not delayed hypothermia reduced neuronal loss and microglial induction in the striatum, with faster recovery of spectral edge frequency, reduced seizure burden, and less suppression of electroencephalographic amplitude (P<0.05). CONCLUSIONS - : Recovery of higher electroencephalographic frequencies may be a biomarker of effective hypothermic neuroprotection in the preterm-equivalent brain.

Original languageEnglish
Pages (from-to)585-587
Number of pages3
JournalStroke
Volume46
Issue number2
DOIs
Publication statusPublished - Feb 2015
Externally publishedYes

Keywords

  • EEG
  • hypothermia

Cite this

Wassink, Guido ; Barrett, Robert D. ; Davidson, Joanne O. ; Bennet, Laura ; Galinsky, Robert ; Dragunow, Michael ; Gunn, Alistair J. / Hypothermic neuroprotection is associated with recovery of spectral edge frequency after asphyxia in preterm fetal sheep. In: Stroke. 2015 ; Vol. 46, No. 2. pp. 585-587.
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abstract = "BACKGROUND AND PURPOSE - : Electroencephalographic recovery is predictive of outcome after perinatal hypoxia-ischemia, but it is unknown whether early changes in electroencephalographic can predict the response to therapeutic hypothermia in the preterm brain. METHODS - : 0.7 gestation fetal sheep received umbilical cord occlusion or sham occlusion for 25 minutes, followed by sham hypothermia or whole-body cooling started either 30 minutes or 5 hours after occlusion and continued for 72 hours. RESULTS - : Early but not delayed hypothermia reduced neuronal loss and microglial induction in the striatum, with faster recovery of spectral edge frequency, reduced seizure burden, and less suppression of electroencephalographic amplitude (P<0.05). CONCLUSIONS - : Recovery of higher electroencephalographic frequencies may be a biomarker of effective hypothermic neuroprotection in the preterm-equivalent brain.",
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Hypothermic neuroprotection is associated with recovery of spectral edge frequency after asphyxia in preterm fetal sheep. / Wassink, Guido; Barrett, Robert D.; Davidson, Joanne O.; Bennet, Laura; Galinsky, Robert; Dragunow, Michael; Gunn, Alistair J.

In: Stroke, Vol. 46, No. 2, 02.2015, p. 585-587.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Hypothermic neuroprotection is associated with recovery of spectral edge frequency after asphyxia in preterm fetal sheep

AU - Wassink, Guido

AU - Barrett, Robert D.

AU - Davidson, Joanne O.

AU - Bennet, Laura

AU - Galinsky, Robert

AU - Dragunow, Michael

AU - Gunn, Alistair J.

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AB - BACKGROUND AND PURPOSE - : Electroencephalographic recovery is predictive of outcome after perinatal hypoxia-ischemia, but it is unknown whether early changes in electroencephalographic can predict the response to therapeutic hypothermia in the preterm brain. METHODS - : 0.7 gestation fetal sheep received umbilical cord occlusion or sham occlusion for 25 minutes, followed by sham hypothermia or whole-body cooling started either 30 minutes or 5 hours after occlusion and continued for 72 hours. RESULTS - : Early but not delayed hypothermia reduced neuronal loss and microglial induction in the striatum, with faster recovery of spectral edge frequency, reduced seizure burden, and less suppression of electroencephalographic amplitude (P<0.05). CONCLUSIONS - : Recovery of higher electroencephalographic frequencies may be a biomarker of effective hypothermic neuroprotection in the preterm-equivalent brain.

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