Research Article
Endogenous Ouabain: An Old Cardiotonic Steroid as a New Biomarker of Heart Failure and a Predictor of Mortality after Cardiac Surgery
Figure 3
EO levels (blue = preoperative; red = postoperative) according to each NYHA class ( after correction for sex, age, BMI, preoperative GFR, EuroSCORE, and baseline level of EO).