关键词: 二尖瓣环自动追踪技术, 左心室收缩功能, 冠状动脉粥样硬化性心脏病

Abstract: Objective To examine the clinical application of automated mitral annular tracking for assessing left ventricular systolic function in coronary atherosclerotic heart disease (CAD). The automated mitral annular tracking technology and improved Simpson method and left ventricular angiography method measured the correlation between left ventricular systolic function. Methods The subjects were 110 cases include 47 healthy volunteers and 63 cases of patients with coronary heart disease. End-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), cardiac output (CO), left ventricular ejection fraction (LVEF), stroke index (SI) and cardiac index (CI) were detected by automated mitral annular tracking and modified Simpson method in the apical window at 4-chamber, respectively. All parameters were compared between the two ways and were determined with the correlation analysis. Thirty cases of CAD patients with left ventricular angiography were associated with automated mitral annular tracking measure for analysis. The left ventricular angiography, automated mitral annular tracking, modified Simpson method were used to measure the difference between left ventricular indicators. Results The r of EDV, ESV, SV, CO, LVEF, SI and CI were 0.838, 0.917, 0.611, 0.579, 0.648, 0.514 and 0.541 between automated mitral annular tracking and modified Simpson method in normal subjects. The r of EDV, ESV, SV, CO, LVEF, SI and CI were 0.875, 0.912, 0.693, 0.664, 0.725, 0.688 and 0.684 between automated mitral annular tracking and modified Simpson method in CAD. The r of EDV, ESV, SV, CO, LVEF, SI and CI were 0.850, 0.920, 0.627, 0.604, 0.711, 0.617 and 0.631 between automated mitral annular tracking and modified Simpson method in all subjects. The r of EDV, ESV, SV, CO, LVEF, SI and CI were 0.842, 0.892, 0.651, 0.614, 0.709, 0.616 and 0.630 between automated mitral annular tracking and left ventricular angiography in 30 CAD. Mitral valve ring automatic tracking technology and modified Simpson method and left ventricular angiography for left ventricular function indicators measuring no statistical difference. Conclusion Automated mitral annular tracking showed a good correlation with modified Simpson method and left ventricular angiography for assessing left ventricular systolic function. Automated mitral annular tracking method and the above two methods had no significant differences in left ventricular systolic function measurement. Automated mitral annular tracking method is a simple and accurate method to evaluate left ventricular systolic function.

Key words: automated mitral annular tracking, left ventricular systolic function, coronary atherosclerotic heart disease