期刊
BMC NEUROLOGY
卷 14, 期 -, 页码 -出版社
BMC
DOI: 10.1186/s12883-014-0159-2
关键词
EEG; Prognosis; Interrater variability; Brain injury; Out-of-hospital cardiac arrest; Hypothermia; Resuscitation
资金
- Swedish Heart and Lung Association
- Skane University Hospital Foundations
- Gyllenstierna-Krapperup Foundation
- Segerfalk foundation
- Swedish National Health System (ALF)
- County Council of Skane
- Swedish Society of Medicine
- Koch Foundation,Sweden
- Swedish Heart-Lung Foundation, Sweden
- AFA Insurance, Sweden
- Swedish Research Council and Hans-Gabriel and Alice Trolle-Wachtmeister Foundation, Sweden
- Tryg Foundation Denmark
- Swiss National Research Fundation [CR32I3_ 143780]
Background: Electroencephalography (EEG) is widely used to assess neurological prognosis in patients who are comatose after cardiac arrest, but its value is limited by varying definitions of pathological patterns and by inter-rater variability. The American Clinical Neurophysiology Society (ACNS) has recently proposed a standardized EEG-terminology for critical care to address these limitations. In the Target Temperature Management (TTM) trial, a large international trial on temperature management after cardiac arrest, EEG-examinations were part of the prospective study design. The main objective of this study is to evaluate EEG-data from the TTM-trial and to identify malignant EEG-patterns reliably predicting a poor neurological outcome. Methods/Design: In the TTM-trial, 399 post cardiac arrest patients who remained comatose after rewarming underwent a routine EEG. The presence of clinical seizures, use of sedatives and antiepileptic drugs during the EEG-registration were prospectively documented. After the end of the trial, the EEGs were retrieved to form a central EEG-database. The EEG-data will be analysed using the ACNS EEG terminology. We designed an electronic case record form (eCRF). Four EEG-specialists from different countries, blinded to patient outcome, will independently classify the EEGs and report through the eCRF. We will describe the prognostic values of pre-specified EEG patterns to predict poor as well as good outcome. We hypothesise three patterns to always be associated with a poor outcome (suppressed background without discharges, suppressed background with continuous periodic discharges and burst-suppression). Inter- and intra-rater variability and whether sedation or level of temperature affects the prognostic values will also be analyzed. Discussion: A well-defined terminology for interpreting post cardiac arrest EEGs is critical for the use of EEG as a prognostic tool. The results of this study may help to validate the ACNS terminology for assessing post cardiac arrest EEGs and identify patterns that could reliably predict outcome.
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