Three-dimensional numerical simulations are employed to investigate the hemodynamic effects of abnormal E/A ratios on left ventricular filling. The simulations are performed in a simplified geometric model of the left ventricle (LV) in conjunction with a specified endocardial motion. The model has been carefully designed to match the important geometric and flow parameters under the physiological conditions. A wide range of E/A ratios from 0 to infinity is employed with the aim to cover all the possible stages of left ventricle diastolic dysfunction (DD). The effects of abnormal E/A ratios on vortex dynamics, flow propagation velocity, energy consumption as well as flow transport and mixing are extensively discussed. Our results are able to confirm some common findings reported by the previous studies, and also uncover some interesting new features.
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June 2014
Research-Article
Computational Study of Hemodynamic Effects of Abnormal E/A Ratio on Left Ventricular Filling
Xudong Zheng,
Xudong Zheng
1
Assistant Professor
Department of Mechanical Engineering,
Boardman Hall 213 A,
e-mail: xudong.zheng@maine.edu
Department of Mechanical Engineering,
University of Maine
,Boardman Hall 213 A,
Orono, ME 04473
e-mail: xudong.zheng@maine.edu
1Corresponding author.
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Qian Xue,
Qian Xue
Department of Mechanical Engineering,
University of Maine
,Orono, ME 04473
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Rajat Mittal
Rajat Mittal
Department of Mechanical Engineering,
Johns Hopkins University
,Baltimore, MD 21218
Search for other works by this author on:
Xudong Zheng
Assistant Professor
Department of Mechanical Engineering,
Boardman Hall 213 A,
e-mail: xudong.zheng@maine.edu
Department of Mechanical Engineering,
University of Maine
,Boardman Hall 213 A,
Orono, ME 04473
e-mail: xudong.zheng@maine.edu
Qian Xue
Department of Mechanical Engineering,
University of Maine
,Orono, ME 04473
Rajat Mittal
Department of Mechanical Engineering,
Johns Hopkins University
,Baltimore, MD 21218
1Corresponding author.
Manuscript received July 2, 2013; final manuscript received March 14, 2014; accepted manuscript posted March 24, 2014; published online April 25, 2014. Assoc. Editor: Dalin Tang.
J Biomech Eng. Jun 2014, 136(6): 061005 (10 pages)
Published Online: April 25, 2014
Article history
Revision Received:
March 14, 2014
Accepted:
March 24, 2014
Received:
June 2, 2014
Citation
Zheng, X., Xue, Q., and Mittal, R. (April 25, 2014). "Computational Study of Hemodynamic Effects of Abnormal E/A Ratio on Left Ventricular Filling." ASME. J Biomech Eng. June 2014; 136(6): 061005. https://doi.org/10.1115/1.4027268
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