[High-sensitivity Cardiac Troponin T in Sepsis:Prognostic Value and Risk Factors of Its Elevation]

Objective To explore the prognostic value of high-sensitivity cardiac troponin T (hs-cTnT) in predicting mortality within 28 days among sepsis patients,and to investigate the risk factors of hs-cTnT elevation. Methods The clinical and laboratory data of patients with sepsis or septic shock who were hospitalized at the Second Affiliated Hospital of Chongqing Medical University from December 2017 to September 2021 were collected and retrospectively analyzed.The patients were assigned into a hs-cTnT elevated group (hs-cTnT>0.1 ng/ml) and a hs-cTnT non-elevated group (hs-cTnT≤0.1 ng/ml).The prognosis was compared between the two groups and the risk factors of hs-cTnT elevation were determined. Results A total of 225 patients were included in this study,including 49 in hs-cTnT elevated group (21.8%) and 176 in hs-cTnT non-elevated group (78.2%).The receiver operating characteristic curve showed that maximum hs-cTnT had predictive value for death within 28 days (P<0.001).The maximum hs-cTnT showed the area under the receiver operating characteristic curve of 0.767 (95%CI=0.699-0.835),the sensitivity of 62.5%,and the specificity of 79.9%.The mortality within 28 days of hs-cTnT elevated group was higher than that of hs-cTnT non-elevated group (53.1% vs. 17.0%, χ²=26.595, P<0.001).Multivariate Logistic regression analysis revealed that the independent predictors of hs-cTnT elevation were age ≥75.5 years (OR=5.990, 95%CI=2.143-16.742, P=0.001),lactate ≥4.05 mmol/L (OR=4.982,95%CI=1.433-17.315,P=0.012),oxygenation index ≤169.15 mmHg (OR=5.052, 95%CI=1.888-13.514, P=0.001),B-type brain natriuretic peptide precursor ≥6 687.0 pg/ml (OR=5.991, 95%CI=2.226-16.128, P<0.001),fibrinogen ≤2.87 g/L (OR=3.325,95%CI=1.175-9.404, P=0.024),and International Society on Thrombosis and Haemostasis overt disseminated intravascular coagulation score ≥5.5 (OR=7.631, 95%CI=1.157-50.338, P=0.035). Conclusions hs-cTnT showed good performance in predicting mortality within 28 days among the patients with sepsis.Coagulation disorder,microthrombus formation,and myocardial oxygen supply-demand mismatch may be the risk factors of myocardial injury in sepsis.