Zhang Y, et al. - The authors performed a systematic review and meta-analysis to summarize the associations between the common biochemical biomarkers, such as serum lactate and creatinine, with clinical outcomes in cardiac arrest patients treated with extracorporeal membrane oxygenation (ECMO). Findings suggested an association of high serum lactate level with poor survival and poor neurological outcome in these patients. They also identified a slight significant association of high creatinine with poor survival.