Abstract:

Objective Using magnetic resonance imaging(MRI) technique as control standard,to explore the feasibility and accuracy of true real-time three-dimensional volume quantitative techniques (RT-3DE) in evaluation of  the left ventricular volume (LVV) and left ventricular ejection fraction (LVEF) of the maintained hemodialysis (MHD) patients.Methods 48  MHD patients were enrolled in this study.RT-3DE was used to detect the LVV and LVEF,while  Simpson’s method and M-Teichholz method were used at the same time.The results of the three methods were compared with the data measured by MRI.Results ①The data  measured by  RT-3DE method   showed a highly positive correlation  with  the   LVV detected by MRI  (r=0.90,P<0.001),but there was no significant  difference between the two methods (P>0.05).②When heart cavity deformed,the results of left ventricular end-diastolic volume(LVEDV) and left ventricular end-systolic volume (LVESV) measured by M-Teichholz method and Simpson’[KG-*3]s method were higher or lower than the data measured by RT-3DE method,and the differences were statistically significant (all P<0.05).Conclusion RT-3DE can accurately measure the volume of normal cardiac chambers and the left ventricular cavity deformation volume. The result of RT-3DE has higher accuracy compared with Simpson’s method and M-Teichholz method.
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Key words: maintained hemodialysis, real-time three-dimensional echocardiography, left ventricular volume, magnetic resonance imaging