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Figure 4 Boxplots of indices of aortic stenosis according to the symptomatic status. Distributions are shown for peak jet velocity (A), mean transvalvular pressure gradient (B), stroke-work loss (C), valve area (D), and valve resistance (E), for patients in Group B. Boxes represent the interquartile distance, whereas the white line represents the median. The shaded zone represents the 95% confidence interval for the median and the whiskers represent the limits of each distribution. Significant differences between groups are ascertained by the lack of overlap of the shaded zones. The highest difference between asymptomatic (Asympt.) and symptomatic (Sympt.) patients is observed for stroke-work loss.