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Regional differences in shape and load in normal and diseased hearts studied by three dimensional tagged magnetic resonance imaging

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Abstract

Objectives: We aimed to characterize regional geometry in relation to load in two groups of patients with hypertrophic cardiomyopathy (HCM) and right ventricular pressure overload (RVPO) in relation to a group of subjects with normal left ventricular (LV) function. Background: Both these diseases are associated with marked changes in LV shape and function, which have not been studied with detailed three dimensional tools. Methods: Three dimensional (3D) tagged magnetic resonance imaging (MRI) was used to characterize the 3D geometry and regional stresses of the left ventricles in patients with HCM and RVPO. Curvatures, stresses, wall thickness, and endocardial motion were calculated from surface and volume elements. Results: Hearts with RVPO exhibited more circumferential and meridional flattening of the septum than normal and HCM hearts. The stress indices were lowest in the HCM hearts, compared to normal and RVPO hearts, due to the larger thicknesses. There was a more significant difference between lateral wall motion and other regional wall motions in the HCM and RVPO hearts as compared to normal hearts. Conclusions: It is suggested that curvature and stress mapping by 3D tagged MRI can be used as an important clinical tool for characterizing and distinguishing between healthy and diseased hearts. The results provided here validated previous knowledge on HCM and RVPO known from planary imaging methods.

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Authors and Affiliations

  1. The Heart System Research Center, Julius Silver Institute of Biomedical Engineering, Technion, Haifa, Israel

    Yael Fisher Petrank, Samuel Sideman & Rafael Beyar

  2. University of Calgary, Calgary, Alberta, Canada

    Sheng Jing Dong & John Tyberg

Authors
  1. Yael Fisher Petrank
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  2. Sheng Jing Dong
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  3. John Tyberg
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  4. Samuel Sideman
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  5. Rafael Beyar
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Petrank, Y.F., Dong, S.J., Tyberg, J. et al. Regional differences in shape and load in normal and diseased hearts studied by three dimensional tagged magnetic resonance imaging. Int J Cardiovasc Imaging 15, 309–321 (1999). https://doi.org/10.1023/A:1006132709895

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  • DOI: https://doi.org/10.1023/A:1006132709895

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