Fig. 2From: Comparison of visual estimation and quantitative measurement of left ventricular ejection fraction in untrained perioperative echocardiographersBland-Altman agreement plots demonstrate the difference between LVEF estimated by participants and experts for each grade with a logarithmic horizontal scale. The X-axis represented the mean of the LVEF estimated by participants and experts for each grade. The Y-axis represented the difference between LVEF estimated by participants and experts for each grade. The red line indicates mean LVEF differences (%), and the green line represents the 95% limits of agreementBack to article page