An elongation model of left ventricle deformation in diastole.
An elongation model of left ventricle deformation in diastole.
复制标题
舒张期左心室变形的伸长模型。
DOI：
10.1080/10255842.2011.607442
复制
发表时间：
2013
影响因子：
1.6
通讯作者：
He,Zhaoming
中科院分区：
文献类型：
--
作者：
Hu,Yingying;Shi,Liang;Du,Dongxing;Parameswaran,Siva;He,Zhaoming
为研究舒张期左心室流体力学，提出了左心室（LV）变形的数值方法和伸长模型。左心室仅沿心尖轴伸长，其运动由心室内流速控制。另外两种左室模型，即固定控制体积模型和扩张模型，也用于模型比较和左室流体力学研究。对于临床球体指数（SI，在 1.0 和 2.0 之间），三个模型在 E 峰沿心尖轴的压力和速度分布几乎没有差异。 SI 较大时，能量耗散较低，因为射流和涡流发展较少受到心尖方向 LV 腔的限制。与继发性径向扩张相比，心尖伸长的 LV 变形可能代表 LV 变形的主要特征。具有适当SI的左室变形伸长模型是研究舒张期左室流体力学的合理、简单的方法。
A 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.