Fig. 4.

Pulse wave velocity versus vessel diameter, measured in ten vessel segments from two mice. The measurements were divided into four categories: 26–38 µm, 38–50 µm, 50–62 µm, and $>62\mathrm{\mu m}$. The PWV and vessel diameter averaged within each of the first three categories show a linear relationship with an $r$-value of 0.999 and a $p$-value of 0.012.