Variables of interest
The analysis was performed using a retrospectively maintained institutional patient database. The variables evaluated included: patient demographics (age, height, weight, sex), patients’ status before ECMO support CPR, duration of CPR, the cause of OHCA/IHCA, CPR characteristics, and initial blood gas analysis), early outcome data (pH and lactate after 12 and 24 hours, blood transfusions, in-hospital mortality, discharge, hospital, and ICU stay. As well as analyzation of end-organ damaging; acute kidney injury (AKI) requiring dialysis, stroke, bleeding, and ischemia.