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Fig. 3B —Bland-Altman plots. Difference (
) in LV ejection fraction
(LVEF) between each pair—MDCT-derived LVEF and echocardiographically
derived LVEF—is plotted against average value of sample pair (solid
line = mean value of differences, dotted lines = mean value of
differences ± 2 SD). Difference in LVEF does not vary in any systematic
way over range of measurements. Mean difference is 3.3% ± 5.8% (range,
-8.2% to 14.8%) to prejudice of average LVEF of echocardiography.
