评价实时三维多平面成像超声心动图测量左室容积准确性的体外模型研究

目的应用体外模型,探讨实时三维多平面成像超声心动图测量左室容积的可行性及准确性。方法用橡胶袋制备不同大小左心室模型20个(其中模拟正常对称性左室模型12个,非对称性左室室壁瘤模型8个),分别应用实时三维超声心动图(RT3DE)多平面成像软件以及二维超声心动图(2DE)测量各模型的容积,其结果与相应的实测容积进行比较。结果12例正常左室模型与8例左室室壁瘤模型中,RT3DE测量的左室容积与实测容积之间呈高度相关,具有高度一致性,且无显著性差异;同样在12例正常左室模型与8例室壁瘤左室模型中,2DE测量的左室容积与实测容积之间相关性较好,两者之间一致性较差,且具有显著性差异。结论实时三维多平面成像超声心动图较之传统的二维超声心动图能够更为准确地测量左室容积,从而奠定了对左室功能进行可靠评价的基础。

Accuracy of Real-Time Three-Dimensional Multiplane Imaging for Quantifying Left Ventricular Volume In Vitro Studies

Objective This study was performed to assess the accuracy of real-time three-dimensional echocardiography (RT3DE) multiplane imaging for measuring left ventricular (LV) volume in vitro.Methods Twenty left ventricular phantoms in different shapes were made of balloons (including 12 normal LV phantoms and 8 LV aneurysm phantoms).The volumes of these phantoms were quantified by RT3DE multiplane imaging and conventional 2DE,respectively.The results were compared with the corresponding actual volumes determined by volumetric cylinder.Results In both 12 normal LV phantoms and 8 LV aneurysm phantoms,the LV volumes measured by RT3DE multiplane imaging correlated quite well with the actual ones.The agreements were pretty good between these two methods.And there were no statistical differences between them.In the same phantoms,although there were also good correlations between the LV volumes measured by 2DE and the actual volumes,the agreements were bad between these two methods.And whether in normal LV phantoms or in LV aneurysm phantoms,the LV volumes measured by 2DE were statistically different from the actual volumes (P<0.05).Conclusions Compared with 2DE,RT3DE multiplane imaging can quantify left ventricular volumes rapidly and accurately,which established the ground of assessing left ventricular function reliably.