Abdominal aortic aneurysm (AAA) is a complex disease that leads to a localized dilation of the infrarenal aorta, the rupture of which is associated with significant morbidity and mortality, however the underlying mechanisms by which such changes remains an important unanswered question in the literature. Animal models of AAA can be used to study how changes in the microstructural and biomechanical behavior of aortic tissues develop as disease progresses in these animals. We chose here to investigate changes in mechanical characteristics with time in the established Apolipoprotein E deficient (ApoE−/−) angiotensin II (AngII) infused mouse model of AAA.

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