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Emerging Tools to Assess the Risk of Rupture in AAA: Wall Stress and FDG PET

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Surgical Management of Aortic Pathology

Abstract

Abdominal aortic aneurysm (AAA) rupture is a significant cause of mortality in developed countries. The growth rate and the rupture of AAA may be unpredictable. This chapter places a special emphasis on evaluating patient-specific approaches to the risk of rupture of AAA, using imaging. Specifically, we describe two pathways of assessing this risk: one being the use of morphologic imaging data to compute wall stress (and wall stress-related parameters) via finite element simulation (FES) and the other, the use of 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) to assess biological processes in the aortic wall components. Both methods are described, along with the limits preventing their widespread use. Nevertheless, the current diameter-based clinical scenarios could be yet impacted by the reported value of FES and FDG PET to predict the risk of AAA rupture. Lastly, the relationship between wall stress and the biological activities as described by FDG PET points at least partially to genetic or acquired alterations of the arterial wall response to wall stress, which can be found in familial aneurysms or in smokers, for example. An integrated patient-specific risk assessment strategy that would include imaging parameters along with personal and heritable risk factors is becoming increasingly suitable.

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Authors and Affiliations

  1. Department of Medical Imaging, Centre Hospitalier de Luxembourg, Luxembourg, Luxembourg

    Alain Nchimi & Thomas Van Haver

  2. GIGA Cardiovascular Sciences, University of Liège, Liège, Belgium

    Alain Nchimi & Natzi Sakalihasan

  3. Department of Cardiothoracic Surgery, University of Liege, Liège, Belgium

    Alain Nchimi & Natzi Sakalihasan

  4. KTH Solid Mechanics, University of Stockholm, Stockholm, Sweden

    Christian T. Gasser

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  1. Alain Nchimi
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  2. Thomas Van Haver
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  3. Christian T. Gasser
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  4. Natzi Sakalihasan
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Correspondence to Alain Nchimi .

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Editors and Affiliations

  1. Fmr Royal Brompton Hospital, London, UK

    Olaf H. Stanger

  2. Royal Brompton Hospital, London, UK

    John R. Pepper

  3. Heart and Vascular Institute, Cleveland Clinic, Cleveland, OH, USA

    Lars G. Svensson

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Nchimi, A., Van Haver, T., Gasser, C.T., Sakalihasan, N. (2019). Emerging Tools to Assess the Risk of Rupture in AAA: Wall Stress and FDG PET. In: Stanger, O., Pepper, J., Svensson, L. (eds) Surgical Management of Aortic Pathology. Springer, Vienna. https://doi.org/10.1007/978-3-7091-4874-7_30

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