一 超声流体动力学方法测定 舒张早期左室流入血流压力阶ppt课件.pptVIP

一、　超声流体动力学方法测定　　　舒张早期左室流入血流压力阶差二、　血流向量成像图（VFM）技术　　　评估慢性心功能不全患者　　　左心室血流结构的变化;超声流体动力学方法测定舒张早期左室流入血流压力阶差;心室整体舒张功能测定的局限性;左心室舒张功能的超声方法;PAS：肺动脉收缩压 Valsava动作 Ar-A= AR-A时间间期 LAP：左房压; 3D vortex structure at end-diastole found in an idealized ventricle for parameters that correspond to those of a young healthy subject An iso-surface of the λ2 meter (intermediate eigenvalue of the squaum of symmetric and antisymmetric parts of the velocity gradient tensor) ;;Intraventricular pressure gradients;;舒张期左室压↑、左房压↑　→　左室/左房压差↓→　左室流入血流减慢　;IVPGs = 抽吸;;资料与方法;仪器与超声方法;左心室舒张早期测量指标;;;;IVPGs 测量方法;舒张早期左室流入血流压力阶差（IVPGs）;正常人的IVPGs ;限制型舒张功能减低的IVPGs;;讨 论;intraventricular pressure gradients (IVPGs);左心室彩色多普勒血流信号;色阶奇异值Color singular value(CSV);Intraventricular pressure gradients (IVPGs) could be obtained from color singular value (CSV) of color Doppler inflow for assessment of LV diastolic function. The method reflected the changes of left ventricular pressure gradients at early diastole, which could describe the total left ventricular function objectively.;;声学造影微泡显示可以减低左室血流传播速度的测量误差;显示左心室流入血流：VFM可能是更好的选择; ;结　论;血流向量成像图（VFM）技术评估慢性心功能不全患者左心室血流结构的变化;研究背景;;;;P＜0.001 ;左室流出道层流与涡流持续时间间期;结 果;;结　果;CHF状态下，左心室主涡流为一个体积大、自身流速缓慢的漩涡，缓慢向左心室出口播散 有别于正常人左心室主涡流体积相对较小、自身流动速度较快的血流结构特征;;血流结构与几何结构对泵功能的作用;局限性;;;;Department of Ultrasound Function ;Department of Ultrasound Function ;Limitations of current measurement of whole diastolic function of left ventricule ;Methods for calculation of diastolic function;PAS：肺动脉收缩压 Valsava动作 Ar-A= AR-A时间间期 LAP：左房压; 3D vortex structure at end-diastole found in an idealized ventricle for parameters that correspond to those of a young healthy subject An iso-surface of the λ2 meter (intermediate eigenvalue of the squaum of symmetric and antisymmetric parts of the velocity gradient tensor) ;Vortex inside LV from VFM;Intraventricular pressure gradients;Do VFM Works in Evaluation of Diastolic Function of Left Ventricle?;In LV Diastolic Dysfunction LVEDP↑ LAP↑　→　ΔLVP/LAP↓ → LV in