M型及多普勒超声心动图对扩张型心肌病心室功能的对照研究

A Comparison Study of Tei Index Using Doppler and M-Mode Echocardiography in Patients with Dilated Cardiomyopathy

目的 对比观察M型与多普勒超声心动图对扩张型心肌病左心室TeiIndex的测量及临床应用价值。方法 对临床及超声心动图确诊的窦性心律扩张型心肌病 3 0例患者 ,分别采用M型及多普勒超声心动图测量左心室的心室功能并以健康体检者 3 0例作为对照组 ,分析两种超声心动图方法获得的左心室TelIndex的相关性以及其对扩张型心肌病诊断的特异性及敏感性。结果 3 0例扩张型心肌病患者M型超声心动图测量TelIndex为 0 .80± 0 .3 1,对照组为 0 .3 0± 0 .0 7(P <0 .0 1)。多普勒超声心动图测量TelIndex为 0 .92± 0 .3 4,对照组为 0 .3 3± 0 .0 6(P <0 .0 1)。两者具有良好的相关性 (r =0 .783 ,P <0 .0 1)。以TelIndex≥ 0 .45为诊断扩张型心肌病的界限 ,通过M型取得的TelIndex对扩张型心肌病的诊断敏感度为 10 0 % ,特异度为 93 .8% ,而应用多普勒超声心动图取得的TelIndex对扩张型心肌病的诊断敏感度与特异度分别为 10 0 % ,93 .8%。结论 与多普勒超声心动图取得的TelIndex一样 ,通过M型超声心动图获得的TelIndex是一种简单可靠 ,无创评估左室功能的超声心动图指标 。

Objective The study was to compare the Tei Index by Doppler echocardiography and M-Mode echocardiography in patients with dilated cardiomyopathy. Methods Thirty patients with dilated cardiomyopathy and 30 normal subjects were enrolled in the study. The Tei Indexes obtained from LV M-mode and mitral Doppler calculation were assessed.Results The value of Tei Index by M-mode echocardiography was 0.80±0.31 and the Tei Index by Doppler echocardiography was 0.92±0.34. They were significantly related (r=0.78,P<0.0001). Using Tei Index≥0.45 as a criteria, patients with dilated cardiomyopathy could be recognized by a sensitivity of 100% and a pecificity of 93.75% using Doppler mode, and 100% and 93.75% using M-Mode, respectively.Conclusion The Tei Index obtained by M-mode echocardiography is a simple and helpful index for evaluation cardiac dysfunction as same as that obtained by Doppler echocardiography.