Evaluation Of Left Ventricular Function In Patients With Coronary Heart Disease With Myocardial Infarction By Real - Time Three - Dimensional Echocardiography

Objective To study the accuracy of evaluating left ventricular systolic function from real-time three-dimensional echocardiography(RT-3DE)in patients with myocardial infarction.Methods 1.A total of 25 patients with myocardial infarction underwent routine two dimensional echocardiography(2DE), RT-3DE and cardiac magnetic resonance imaging(CMRI).And then left ventricular end-diastolic volume(LVEDV), stroke volume(SV) and left ventricular ejection fraction(LVEF) were measured by Simpson method based on 2DE, RT-3DE and CMRI respectively. 2. The selected 48 cases of left ventricular infarction that clinically diagnosed were divided into 4 groups: inferior wall(n=12), posterior wall(n = 13), anterior and anteroseptal wall(n=12)and lateral wall(n=11). By using two-dimensional echocardiography(2DE) Simpson, RT-3DE and magnetic resonance imaging( CMRI),every cases was measured, and left ventricle diastolic volume(LVEDV),stoke volume(SV)and left ventricular ejection fraction(LVEF)were comparative analyzed.Results 1. 1.1There were significant difference between LVEDV and SV measured by simpson method based on 2DE and those from CMRI(P <0.05) though there wasn’t any significant difference between LVEF from Simpson method and that from CMRI(P> 0.05).There were not significant difference between LVEDV, SV and LVEF obtained from RT-3DE and those from CMRI(P> 0.05). 1.2 LVEDV, SV, LVEF measured by Simpson method correlated with those from CMRI respectively(r=0.75, 0.75, 0.80,P<0.05). And there was good correlation between LVEDV,SV, and LVEF from RT-3DE and those from CMRI respectively(r =0.89, 0.88, 0.91,P <0.05).2. 2.1There were significant difference in 1,3 and 4 Group in LVEDV and SV,and there was no significant statistical difference in group 1,3 and 4 in LVEF by using 2DE Simpson and CMRI(P<0.05). The cases of group 2 presented significant difference in LVEDV, SV and LVEF by using 2DE Simpson, CMRI(P<0.05).There was no significant statistical difference in four groups in LVEDV, SV and LVEF by using RT-3DE and CMRI(P>0.05). 2.2 LVEDV, SV, LVEF measured by Simpson method correlated with those from CMRI respectively(group1 r=0.72, 0.73, 0.80, group2 r=0.64, 0.61, 0.62 group3 r=0.76, 0.75, 0.84 group4 r=0.77, 0.75, 0.80,P<0.05). And there was good correlation between LVEDV,SV, and LVEF from RT-3DE and those from CMRI respectively(group1 r=0.89, 0.89, 0.90 group 2 r =0.89, 0.90, 0.92 group 3 r=0.88, 0.88, 0.90 group4 r=0.89, 0.88, 0.91, P <0.05).Conclusion It was proved that left ventricular systolic function could be evaluated accurately from RT-3DE and RT-3DE might provide a new reliable way to appraise cardiac function in patients with myocardial infarction. Measurement of left ventricular posterior wall myocardial infarction in patients with left ventricular systolic function is more accurate.