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Aortic local biomechanical properties in ascending aortic aneurysms
Siyu Lin1, Marie Catherine Morgant2, Diana M Marín-Castrillón1
1ImViA laboratory, University of Burgundy, Dijon, France.
Ascending aortic aneurysm (AsAA) stiffness is influenced by multiple factors, including age, smoking, diabetes, and coronary artery disease. The study found longitudinal aortic wall stiffness is greater than circumferential stiffness in patients with AsAA.
Area of Science:
- Cardiovascular biomechanics
- Aortic aneurysm research
Background:
- Ascending aortic aneurysm (AsAA) is a serious cardiovascular condition with rising incidence.
- Understanding the biomechanical properties of the aortic wall is crucial for predicting aneurysm behavior.
Purpose of the Study:
- To investigate the biomechanical properties of ascending aortic aneurysm walls.
- To identify risk factors influencing aortic stiffness in patients with AsAA.
Main Methods:
- Ex-vivo equi-biaxial tensile tests were performed on 100 ascending aortic aneurysm wall samples.
- Aortic wall stiffness was quantified using the maximum Young modulus (MYM).
- Analysis considered various patient demographics, medical history, and aortic characteristics.
Main Results:
- Longitudinal aortic wall stiffness was significantly higher than circumferential stiffness.
- Multivariate analysis revealed age, smoking history, diabetes, aortic stenosis, coronary artery disease, and aortic diameter significantly influenced MYM.
- Arterial hypertension, dyslipidemia, obesity, and bicuspid aortic valve did not show a significant impact on MYM.
Conclusions:
- Aortic stiffness in ascending aortic aneurysms is a multifactorial characteristic.
- Biomechanical properties vary directionally within the aortic wall.
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