论文部分内容阅读
目的探究速度向量成像技术(VVI)评估左室舒张功能的临床价值。方法 253例患者行常规超声心动图检查,依据舒张功能评估指南分为舒张功能正常组和舒张功能异常组,运用VVI后处理软件分析动态图像,记录VVI 4个指标:舒张早期左室纵向6个基底段心肌峰值速度平均值(6M-Ev)、应变率平均值(6MEsr)以及舒张早期二尖瓣口血流峰值速度(E)与前两者的比值E/6M-Ev、E/6M-Esr。结果 (1)与舒张功能正常组比较,异常组左室内径增大、室壁增厚、左房容积指数增大、舒张功能评估参数异常(P均<0.05);(2)与舒张功能正常组比较,异常组6M-Ev和6M-Esr均减小(P<0.01),而E/6M-Ev和E/6M-Esr均增大(P<0.01);(3)6M-Ev、6M-Esr、E/6M-Ev和E/6M-Esr的ROC曲线下面积分别为0.92、0.78、0.75、0.59(P均<0.05),截断值分别为5.0、1.2、15、76;(4)6M-Ev、6M-Esr、E/6M-Ev、E/6M-Esr与舒张功能异常的相关性分别为-0.71、-0.48、0.43、0.15(P均<0.05)。结论 VVI对左室舒张功能评估具有一定临床价值,评估参数较多,其中6M-Ev是一个相对较好指标。
Objective To investigate the clinical value of velocity vector imaging (VVI) in assessing left ventricular diastolic function. Methods 253 patients underwent routine echocardiography. According to the diastolic function assessment guidelines, they were divided into diastolic dysfunction group and diastolic dysfunction group. VVI postprocessing software was used to analyze the dynamic images. Four indicators of VVI were recorded: early left ventricular diastolic 6 (6M-Ev), mean strain rate (6MEsr), and peak mitral flow velocities (E) and E / 6M-Ev, E / 6M- Esr. Results Compared with normal diastolic function group, left ventricular diameter increased, wall thickening, left atrium volume index increased, diastolic function assessment parameters were abnormal (all P <0.05); (2) Diastolic function was normal The levels of 6M-Ev and 6M-Esr in the abnormal group were significantly decreased (P <0.01), while the ratios of E / 6M-Ev and E / 6M-Esr were significantly increased The area under the ROC curve of -Esr, E / 6M-Ev and E / 6M-Esr were 0.92,0.78,0.75,0.59 respectively (all P <0.05), the cutoffs were 5.0,1.2,15,76 respectively; Correlations of 6M-Ev, 6M-Esr, E / 6M-Ev and E / 6M-Esr with diastolic dysfunction were -0.71, -0.48 and 0.43, 0.15 respectively (all P <0.05). Conclusion VVI has a certain clinical value of assessment of left ventricular diastolic function, assessment parameters are more, of which 6M-Ev is a relatively good indicator.