The Comparative Study Of The Value Of Rt-3de With Mri Test In Evaluationg The Function Of The Anomalous Left Ventricle

ObjectiveTo assess the value of RT-3DE in evaluating the function of the anomalous left ventricle.Methods20 normal subjects,20 DCM subjects and 20 LVA subjects were selected. All the subjects were given the real-time three-dimensional echocardiography and MRI test. The RT-3DE full volume images were analyzed with the Qlab software and the MRI images were analyzed with the Argus software, which calculate the cardiac function items including EDV, ESV and LVEF. With MRI as the gold standard, Bland-Altman method was used to analysis the agreement of two methods in the EDV ESV and LVEF.ResultIn the normal group, the bias of EDV measured by two methods is 6.9±7.9(ml) and 95% limits of agreement is (22.38ml,-8.58ml). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 17.1ml and the mean is 128.2ml, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other. The bias of ESV measured by two methods is 1.9±3.0(ml) and 95% limits of agreement is (7.78ml,-3.98ml). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 5.2ml and the mean is 45.1ml, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other. The bias of LVEF measured by two methods is 0.6±0.9(%) and 95% limits of agreement is (2.34%,-1.16%). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 2.34% and the mean is 60.15%, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other.In DCM group, the bias of EDV measured by two methods is 11.0±31.3(ml) and 95% limits of agreement is (72.35ml,-50.35ml). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 27.83ml and the mean is 183.89ml, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other. The bias of ESV measured by two methods is 6.8±19.6(ml) and 95% limits of agreement is (45.3ml,-31.7ml). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 18.47ml and the mean is 108.69ml, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other. The bias of LVEF measured by two methods is 0.6±0.9(%) and 95% limits of agreement is (2.36%,-1.16%). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 4.53% and the mean is 34.67%, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other.In LVA group, the bias of EDV measured by two methods is 17.94±11.72(ml) and 95% limits of agreement is (40.89ml,-5.03ml). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 28.45ml and the mean is 186.45ml, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other. The bias of ESV measured by two methods is 11.86±10.92(ml) and 95% limits of agreement is (33.69ml,-9.97ml). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 21.38ml and the mean is 121.29ml, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other. The bias of LVEF measured by two methods is 5.08±6.89(%) and 95% limits of agreement is (18.52%,-8.45%). From the Bland-Altman graph analysis:5% of points outside the limits of agreement and 95% of points in the limits of agreement. In the limits of agreement, the maximum difference is 7.23% and the mean is 61.56%, this result can be accepted in clinical practice, two methods have better agreement and can be replaced each other.ConclusionThis study demonstrated that the RT-3DE full volume images have the equal accuracy and the better agreement in evaluating the cardiac function with MRI test. RT-3DE full volume images have the dominance of accurate measurement, operating easily, convenient, repeatable inspection and low payment. RT-3DE full volume images can replace the MRI test in evaluating cardiac function.