Yingying Hu, Liang Shi, Dongxing Du, Siva Parameswaran, Zhaoming He
Department of Mechanical Engineering, Texas Tech University, Lubbock, 7th St. and Boston Ave., P.O. Box 41021, Lubbock, TX 79409-1021, USA.
Computer methods in biomechanics and biomedical engineering 2013A numerical method of the left ventricle (LV) deformation, an elongation model, was put forth for the study of LV fluid mechanics in diastole. The LV elongated only along the apical axis, and the motion was controlled by the intraventricular flow rate. Two other LV models, a fixed control volume model and a dilation model, were also used for model comparison and the study of LV fluid mechanics. For clinical sphere indices (SIs, between 1.0 and 2.0), the three models showed little difference in pressure and velocity distributions along the apical axis at E-peak. The energy dissipation was lower at a larger SI in that the jet and vortex development was less limited by the LV cavity in the apical direction. LV deformation of apical elongation may represent the primary feature of LV deformation in comparison with the secondary radial expansion. The elongation model of the LV deformation with an appropriate SI is a reasonable, simple method to study LV fluid mechanics in diastole.
Yingying Hu, Liang Shi, Dongxing Du, Siva Parameswaran, Zhaoming He. An elongation model of left ventricle deformation in diastole. Computer methods in biomechanics and biomedical engineering. 2013;16(1):66-72
PMID: 21916674
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