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The purpose of the preliminary study of dual-source CT assessment of left ventricular function: (1) different RR interval during every reconstruction, namely whether the differences in the assessment of left ventricular function was measured during the 2%, 5% and 10% of RR interval reconstruction. (2) Comparison of dual-source CT (Dual-source CT DSCT) and echocardiographic assessment of left ventricular function, and to investigate the accuracy and feasibility of DSCT in the quantitative assessment of left ventricular function. Materials and methods: (1) normal group (n = 24) and in patients with coronary heart disease group (26 cases) were dual-source CT (Dual-source CT DSCT) coronary arteriography, respectively, 2%, 5% and 10%, RR between during every preview reconstruction phase to take the the ventricular cavity smallest image as systolic and end-diastolic phase as the image of the left ventricular cavity area reconstruction images were transferred to the cardiac function analysis software to analyze were measured left ventricular end-diastolic volume (LVEDV), left ventricular end-systolic volume (LVESV), stroke output quantity (SV), left ventricular ejection fraction (LVEF). Set of data for statistical one-way ANOVA analysis and the normal group and the group of patients with coronary heart disease were 10% renewal data using two independent samples t-test analysis. (2) dual-source CT coronary angiography and echocardiographic examination of 31 cases of patients with clinically confirmed or suspected coronary atherosclerotic heart disease, left ventricular end-systolic volume were measured, end-diastolic volume and left ventricular ejection fraction value and statistical analysis. Results: (1) determination of left ventricular function during the 2%, 5% and 10% of RR interval reconstruction, each parameter was no significant difference between (normal group among the ESV and EDV, SV, EF P value for 0.775,0.885,0.935,0.204 P gt; 0.05; CHD patients among the ESV, EDV, SV, EF P values ??were 0.864,0.739,0.538,0.632 P gt; 0.05). Normal group and patients with coronary heart disease group data without significant difference (between the two groups ESV and EDV, SV, EF P values ??were 0.235,0.055,0.063,0.847 P gt; 0.05). (2) measured by dual source CT and echocardiographic left ventricular function data of each group has a high correlation (ESV, EDV, EF's r values ??were 0.87,0.70,0.76). Conclusions: (1) during the 2%, 5% and 10% of RR interval reconstruction determination of left ventricular function indicators, no significant differences in the clinical can be applied to the period between 10% RR interval reconstruction determination of left ventricular function, relatively convenient accurate. (2) dual-source CT coronary angiography and ultrasound echocardiography in the assessment of left ventricular function with a high correlation; dual-source CT can not only analysis of coronary artery disease, as well as quantitative assessment of left ventricular function.
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