Feasibility of Bilinear Mechanical Characterization of the Abdominal Aorta in a Hypertensive Mouse Model.

Feasibility of Bilinear Mechanical Characterization of the Abdominal Aorta in a Hypertensive Mouse Model.
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DOI:
10.1016/j.ultrasmedbio.2021.08.001
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发表时间:
2021-12
影响因子:
2.9
通讯作者:
Konofagou EE
Konofagou EE
中科院分区:
医学3区
文献类型:
--
作者:
Kemper PPN;Mahmoudi S;Apostolakis IZ;Konofagou EE

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A change in elastin and collagen content is indicative of damage caused by hypertension, which changes the non-linear behavior of the vessel wall. This study was aimed at investigating the feasibility of monitoring the non-linear material behavior in an angiotensin II hypertensive mice model. Aortas from 13 hypertensive mice were imaged with pulse wave imaging (PWI) over 4 wk using a 40-MHz linear array. The pulse wave velocity was estimated using two wave features: (i) the maximum axial acceleration of the foot (PWVdia) and (ii) the maximum axial acceleration of the dicrotic notch (). The Bramwell-Hill equation was used to derive the compliance at diastolic and end-systolic pressure. This study demonstrated the potential of PWI in a hypertensive mouse model to image and quantify the non-linear material behavior in-vivo. End-systolic compliance could differentiate between the sham and Ang-II group whereas the diastolic compliance could not, indicating that PWI can detect early collagen-dominated remodeling.
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