A Unique 3D Aortic Model to Risk Stratify Aortic Pathology

  • #AC/AOR 02-EP-12
  • Adult Cardiac Surgery/Aortic. E-POSTER (ORAL) SESSION 2
  • E-Poster (oral)

A Unique 3D Aortic Model to Risk Stratify Aortic Pathology

Timothy L. Surman 1, Jason Varzaly 1, Dermot Orourke 2, Karen Reynolds 2, Michael G. Worthington 1, James E. Edwards 1

Royal Adelaide Hospital, Adelaide, Australia; flinders university, adelaide, Australia;

Date, time and location: 2018.05.25 15:30, Exhibition area, 1st Floor. Zone – C



Ascending aortic replacement reflects AHA/ACC and ESC/EACTS guidelines encompassing expert opinion and detailed echocardiogram, x-ray and CT imaging but minimal empirical evidence. Using a combined mechanical testing and aortic finite element (FE) model to assess stress failure of the ascending aorta and aortic root; we aim to better understand the mechanical consequence of aortic aneurysms and to try to identify better predictive parameters of risk of dissection than current surgical guidelines.


Using porcine and human specimens of the ascending aorta and aortic root, tissue samples will undergo combined mechanical testing and finite element analysis (FEA) to determine the functional limits of the aorta under stress. This involves a unique apparatus design that provides inflation testing with digital image correlation, which will provide local aortic stress and strain values to be modelled.


With values obtained from a detailed literature search of 34 studies, and collected CT imaging data we have created an initial reconstruction of the trileaflet aortic valve, aortic root and ascending aorta. Subsequently, using FEA, appropriate stress and strain values have been mapped and reconstructed into a working 3D model.

Figure 1: The proposed mechanical and finite element modelling apparatus

Figure 2: Preliminary 3D reconstructions of the aortic root and ascending aorta using stress and strain data


Early results in our collection of patient data has allowed the incorporation of mechanical properties through mechanical testing, digital image correlation and finite element analysis to create a true anatomic form of the ascending aorta and aortic root. Further testing will involve porcine and human aortic specimens and we aim to apply this 3D modelling to future clinical stratification of aortic pathology.

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