Figure 2.

Passive axial force-stretch behavior during cyclic extension tests at three fixed pressures. The vertical line represents the cross-over point, which indicates the in-vivo value of axial stretch λziv (Humphrey et al., 2009). (a) Representative data from the untreated control group, vessel #4. (b) Representative data from the Ang-II infusion without AAA group, vessel #1. (c) Representative data from the Ang-II infusion with AAA group, vessel #1. Despite the trend toward axial stiffening and decrease in the in-vivo axial stretch, there was no significant difference between the two Ang-II groups and the untreated control group (cf. Table 1).