In this paper, a method is presented to analyze the mechanical stress distribution in a pacing lead based on a sequence of paired 2D angiographic images. The 3D positions and geometrical shapes of an implanted pacemaker lead throughout the cardiac cycle were generated using a previously validated 3D modeling technique. Based on the Frenet–Serret formulas, the kinematic property of the lead was derived and characterized. The distribution of curvature and twist angle per unit length in the pacing lead was calculated from a finite difference method, which enabled a rapid and effective computation of the mechanical stress in the pacing lead. The analytical solution of the helix deformation geometry was used to evaluate the accuracy of the proposed numerical method, and an excellent agreement in curvature, twist angle, and stresses was achieved. As demonstrated in the example, the proposed technique can be used to analyze the complex movement and deformation of the implanted pacing lead in vivo. The information can facilitate the future development of pacing leads.
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April 2011
Research Papers
In Vivo Stress Analysis of a Pacing Lead From an Angiographic Sequence
L. Liu,
L. Liu
Department of Mechanical Engineering,
Texas A&M University
, College Station, TX 77843
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J. Wang,
J. Wang
Department of Engineering Technology and Industrial Distribution, Department of Mechanical Engineering,
e-mail: jwang@tamu.edu
Texas A&M University
, College Station, TX 77843
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W. Yang,
W. Yang
Department of Mechanical Engineering,
Texas A&M University
, College Station, TX 77843
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S. J. Chen
S. J. Chen
Department of Medicine/Cardiology, Department of Bioengineering,
University of Colorado Denver
, Aurora, CO 80045
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L. Liu
Department of Mechanical Engineering,
Texas A&M University
, College Station, TX 77843
J. Wang
Department of Engineering Technology and Industrial Distribution, Department of Mechanical Engineering,
Texas A&M University
, College Station, TX 77843e-mail: jwang@tamu.edu
W. Yang
Department of Mechanical Engineering,
Texas A&M University
, College Station, TX 77843
S. J. Chen
Department of Medicine/Cardiology, Department of Bioengineering,
University of Colorado Denver
, Aurora, CO 80045J Biomech Eng. Apr 2011, 133(4): 041004 (12 pages)
Published Online: March 8, 2011
Article history
Received:
March 25, 2010
Revised:
January 17, 2011
Posted:
January 28, 2011
Published:
March 8, 2011
Online:
March 8, 2011
Citation
Liu, L., Wang, J., Yang, W., and Chen, S. J. (March 8, 2011). "In Vivo Stress Analysis of a Pacing Lead From an Angiographic Sequence." ASME. J Biomech Eng. April 2011; 133(4): 041004. https://doi.org/10.1115/1.4003524
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