EDN1 and heart failure: Serum CXCL8 was positively correlated with ET-1 in patients with sepsis complicated with heart failure (r = 0.531, P < 0.05), and the two were positively correlated with SOFA score and APACHE II score (P < 0.05) and were negatively correlated with LVEF, SV, CO, and CI (P < 0.05).