多普勒组织成像对正常人左心室收缩功能的分析

目的 :应用多普勒组织成像脉冲技术评价正常人左心室整体收缩功能。研究二尖瓣环舒缩速度与左心室整体收缩功能间的相关性 ,以及观察二尖瓣环舒缩速度与左心室射血分数间是否存在直线回归关系。方法 :转换多普勒组织成像速度模式 ,取心尖四腔心、二腔心、心尖左心室长轴切面 ,分别测量二尖瓣环后间隔、侧壁、前壁、下壁、前间隔及后壁的舒张早期峰值速度 (E)、舒张晚期峰值速度 (A)、收缩期峰值速度 (S)。应用改良Simpson法测量左心室射血分数。结果 :左心室射血分数与二尖瓣环前间隔S、E与肺静脉D波比值 (E/D) ,后间隔S ,前壁与后壁的E/D存在直线相关关系。结论 :多普勒组织成像测量二尖瓣环舒缩速度可反映左心室整体收缩功能。并且发现左心室收缩功能不仅与二尖瓣环收缩速度有关 ,而且与舒张速度也相关。二尖瓣环前间隔是反映这一现象的最好位点。

Assessment of Left Ventricular Systolic Function in Normal Subjects by Doppler Tissue Imaging

Objective: The aim of this study was to examine the clinical application of pulsed Doppler tissue imaging for assessing left ventricular systolic function in normal subjects and try to find if there is a linear correlation between left ventricular ejection function (LVEF) and mitral annular velocity.Methods: Mitral annular diastolic and systolic velocity was detected by Doppler tissue imaging using the apical window at 4 chamber,2 chamber and long apical views,respectively.LVEF was calculated by modified Simpson method.The myocardial velocity was determined with analysis of correlation statistics.Results: LVEF had a linear relationship with mitral annular systolic velocity (S),E/D of anterior septum,S of posterior septum,E/D of anterior wall and posterior wall.Conclusion: Left ventricular systolic function was associated with mitral annular diastolic and systolic velocity.The anterior septum in mitral annulus was the best site.