Figure 5f:

MRI-derived vascular parameters before and after e-cigarette vaping. Box-and-whisker plots for the strongest effects observed show (a) SvO₂ during baseline (SvO_2b), (b) SvO₂ washout time (T_W), (c) SvO₂ overshoot, (d) luminal flow-mediated dilation (FMD_L), (e) peak hyperemic blood flow velocity (V_P), and (f) hyperemic index (HI). P values were derived on the basis of paired t tests. The boxes represent inner quartiles; horizontal lines within the box indicate the median and crosses (X) indicate the mean.