The coronavirus disease 2019 (COVID-19) pandemic is a once-in-century crisis to public health. Although the pathogen for COVID-19, the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), has been identified, the pandemic is still ongoing. The critically ill COVID-19 patients account for most disease-associated death; thus, there is an urgent need to identify prognostic factors that would help determine therapeutic approaches. In this study, we retrospectively analyzed the clinical and

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... laboratory findings in 100 critically ill COVID-19 patients in Hubei Women & Children Healthcare Hospital (Guanggu District), of whom 22 patients died in hospital, and 78 patients survived. We found that age, lymphocyte count, and total bilirubin concentration were an independent prognostic factor for critically ill COVID-19 patients. Of particular importance, we observed a significant elevation of myocardium injury biomarkers, including CK-MB, high-sensitivity cardiac troponini I (hs-cTnI), and Mb, in the non-survivor group. These myocardium injury biomarkers appeared to correlate with the time of survival, and two multivariate models have suggested hs-cTnI was a novel prognostic factor with a sensitivity of 75.0% and a specificity of 84.9%. Altogether, our study highlighted the prognostic significance of myocardium injury biomarkers in critically ill COVID-19 patients. Monitoring myocardium injury biomarkers would predict patient survival and guide therapeutic strategy.