FIGURE 2 Changes in LVEF before and after surgery for patients with pre-operative LVEF of >45% and patients with pre-operative LVEF of <45%.
In the box and whisker plots, the lines across each box represent the median LVEF; the box represents the interquartile range (25th–75th percentile) and the I bars represent the 95% confidence intervals.
LVEF, left ventricular ejection fraction.