Is the grey-to-white ratio valuable enough in prediction for cardiac arrest patients rescued with extracorporeal resuscitation?

Lee et al. retrospectively evaluated the utility of the grey-to-white matter ratio (GWR) in predicting neurological outcomes in 30 extracorporeal membrane oxygenation-assisted cardiopulmonary resuscitation (ECPR)-treated out-of-hospital cardiac arrest (OHCA) patients (1). All of their patients had the brain CT just after the ECMO were implanted and before admission to the ICU. They found all GWR were significantly higher in the good outcome group than in the poor outcome group, and the cut-off value with 100% specificity for the prediction of the poor outcome was 1.21 to 1.24 at different locations or different combinations.