Hydrodynamics of color M-mode Doppler flow wave propagation velocity V(p): a computer study.
Hydrodynamics of color M-mode Doppler flow wave propagation velocity V(p): a computer study.
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彩色 M 模式多普勒流波传播速度 V(p) 的流体动力学：计算机研究。
DOI：
10.1067/mje.2002.115456
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
P. Verdonck
中科院分区：
文献类型：
--
作者：
J. Vierendeels;E. Dick;P. Verdonck
本研究旨在揭示左心室（LV）血流波传播的流体动力学机制，并将这种传播速度与二维（2D）彩色和彩色m型多普勒超声心动图联系起来。建立了描述三维轴对称低压充注流的计算机模型。求解了具有运动左室壁面的左室截断椭球体非定常Navier-Stokes流动方程，包括壁面的松弛和柔度。计算结果证实了填充过程中脑室内的流量和压力模式。旋涡是在早期和心房填充波加速阶段形成的。在减速阶段，涡流被放大并对流进入心室。在导出的二维彩色超声心动图上可以识别出漩涡。该涡旋的传播决定了彩色m型多普勒超声心动图中观察到的最大速度的传播。左室充盈不正常时，左室血流波传播速度减慢。
This study was designed to show the hydrodynamic mechanism of left ventricular (LV) flow wave propagation and to relate this propagated velocity to 2-dimensional (2D) color and color M-mode Doppler echocardiograms. A computer model is developed describing 3-dimensional axisymmetrical LV filling flow. The unsteady Navier-Stokes flow equations are solved in an LV truncated ellipsoid geometry with moving LV walls, including relaxation and compliance of the wall. The computed results confirm both intraventricular flow and pressure patterns during filling. Vortices are formed during the acceleration phases of the early and atrial filling waves. During the deceleration phases, the vortices are amplified and convected into the ventricle. The vortices are recognized on the derived 2D color echocardiograms as in vivo. The propagation of this vortex determines the propagation of the maximum velocity observed in the color M-mode Doppler echocardiogram. For pseudonormal filling of the left ventricle, the LV flow wave propagation velocity decreases.
舒张早期左心室区域压力梯度的起源。
DOI：
10.1152/ajpheart.1995.268.2.h550
发表时间：
1995
期刊：
The American journal of physiology.
影响因子：
--
作者：
Nikolic,SD;Feneley,MP;Pajaro,OE;Rankin,JS;Yellin,EL
通讯作者：
Yellin,EL
影响因子：
37.8
作者：
COURTOIS, M;KOVACS, SJ;LUDBROOK, PA
通讯作者：
LUDBROOK, PA