Evaluation of left ventricular systolic function and synchrony in patients with inferior and posterior myocardial infarction using two-dimensional speckle tracking imaging and real-time three-dimensional echocardiography
XU Li, WANG Jian-fei, ZHENG Feng, ZHANG Guo-hui
(1. Room of Echocardiography, 2. Department of Cardiology, the Affiliated People′s Hospital of Jiangsu University, Zhenjiang Jiangsu 212002, China)
Abstract：Objective： Two-dimensional speckle tracking imaging(2DSTI) and realtime threedimensional echocardiography(RT3DE) were used to evaluate the left ventricular systolic function and synchrony in patients with inferior and posterior myocardial infarction. Methods：A total of 20 patients with inferior and posterior myocardial infarction (MI) and 20 healthy controls were enrolled in this study. Echocardiography was performed to collect the left ventricular enddiastolic internal diameter (LVEDD), left ventricular end-systolic internal diameter (LVESD), ejection fraction (EF). We also collected the imagine clips of two cavity, four cavity, long axis at apex. In addition, we collected the imagine clips of short axis at mitral valve, papillary muscle and apex levels. Peak systolic longitudinal strain (L. Strain) and peak systolic circumferential strain (C. Strain) were analyzed by Qlab 9.0 software. We used RT3DE to obtain the left ventricular full-volume images and used Qlab 9.0 software to analyze data, such as the end diastolic volume (LVEDV), end systolic volume (LVESV), stroke volume (SV) and ejection fraction (EF) of left ventricular, we also calculated the time to minimal systolic volume (Tmsv) of 16 segments and the maximal difference of corresponding segments (Tmsv16 Dif). The above parameters as a percentage of the cardiac cycle with different heart rates between patients were also calculated from the Qlab 9.0 software, which were Tmsv16-SD /RR(%)，Tmsv16Dif /RR(%). Results：The LVEF detected by two ways in the MI group was significantly lower (P<0.05). The LVEDD, LVESD and LVESV were significantly higher and SV was significantly lower than those of the control (P<0.05). Both L. Strain and C. Strain of the inferior and posterior segments and part of adjacent segments in MI group were significantly lower than those in the control (P<0.05). The Tmsv16-SD/R-R(%) and Tmsv16-Dif/R-R(%) in MI group were significantly higher than the control (P<0.01). Conclusion：2DSTI and RT-3DE may be used to more accurately and noninvasively evaluate the segmental motion abnormalities of left ventricular and dyssynchrony in patients with inferior and posterior myocardial infarction.
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XU Li, WANG Jian-fei, ZHENG Feng, ZHANG Guo-hui. Evaluation of left ventricular systolic function and synchrony in patients with inferior and posterior myocardial infarction using two-dimensional speckle tracking imaging and real-time three-dimensional echocardiography. Journal of Jiangsu University(Medicine Edition), 2016, 26(05): 410-414.
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2016, Vol. 26 
