摘要
目的应用超声斑点追踪成像技术(STI)评价心肌缺血患者左心室节段心肌径向应变(RS)、圆周应变(CS)的变化规律。方法对56例心肌缺血患者及31名健康自愿者应用超声心动图仪获得高频帧二维图像,测量收缩期左心室基底水平及乳头肌水平的峰值RS和CS。结果随冠状动脉狭窄程度加重其供血心肌节段应变峰值逐渐降低,接受PCI治疗后应变峰值增加。冠状动脉狭窄程度与峰值RS、峰值CS绝对值负相关(r=-0.63,P<0.01;r=-0.54,P<0.01)。结论STI能定量心肌缺血患者的左心室RS和CS,评价局部心肌功能。
Objective To quantitatively analyze the characteristics of radial strain and circumferential strain in myocardial ischemia with speckle tracking echocardiography. Methods Fifty-six patients with myocardial ischemia and 31 healthy subjects were enrolled. High frame rate two-dimensional images were recorded from the left ventricular short-axis views at the levels of mitral annulus and papillary muscle. Radial strain and circumferential strain were measured in the left ventricular short-axis views with 2D strain software. Results With the aggravation of coronary stenosis, the peak strain of the corresponding segments decreased gradually, and then increased after PCI. Radial strain and circumferential strain were negatively correlated with the aggravation of coronary stenosis （r=-0.63, P〈0. 01; r=-0.54, P〈0.01）. Conclusion Regional wall motion of left ventricular in patients with myocardial ischemia can be evaluated accurately with speckle tracking echocardiography.
出处
《中国医学影像技术》
CSCD
北大核心
2009年第8期1411-1414,共4页
Chinese Journal of Medical Imaging Technology
关键词
心肌缺血
超声心动描记术
斑点追踪技术
Myocardial ischemia
Echocardiography
Speckle tracking imaging
