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| valuation of left atrium function and synchrony in patients with acute myocardial infarction using real-time three-dimensional echocardiography |
| WANG Jian-fei1, XU Li1, ZHENG Feng1, SHENG Jia1, ZHANG Guo-hui2 |
| （1. Division of Echocardiography, 2. Department of Cardiology, the Affiliated People′s Hospital of Jiangsu University, Zhenjiang Jiangsu 212002, China)
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Abstract Objective: Real-time three-dimensional echocardiography(RT-3DE) was applied to evaluate the left atrium function and synchrony in patients with acute myocardial infarction. Methods: Thirty patients with acute myocardial infarction(AMI) and 30 controls were enrolled in the study. Echocardiography was performed to assess the left atrium area of apical 4 chambers (LAA4), and left atrium area of apical 2 chambers(LAA2). RT-3DE was used to obtain fullvolume images of apical 4 chambers and used QLAB 9.0 software to analyze data, such as left ventricular ejection fraction (LVEF), left ventricular end diastolic volume(LVEDV), left atrial maximal volume(LAVmax), left atrial minimal volume (LAVmin),left atrial eject fraction(LAEF).From the left atrium timevolume curve and electrocardiogram, we gained the left atrial presystolic volume(LAVpre). And we caculated the left atrial active emptying fraction(LAAEF) and left atrial passive emptying fraction(LAPEF). We obtained the time of left ventricle and left atrium to minimal systolic volume(Tmsv) of 16 segments and the maximal difference of corresponding segments(Tmsv16 Dif). The above parameters as percentage of the cardiac cycle with different heart rates between patients were also calculated with the QLAB9.0 software, which were Tmsv16-SD /R-R（%）,Tmsv16-Dif/R-R（%）. Results: The LAA4 and LAA2 in AMI group were significantly higher than those of the control(P<0.05). The LVEF detected by RT-3DE in the AMI group was significantly lower than that in the control(P<0.05). The LVEDV,the Tmsv16-SD/R-R(%) and Tmsv16-Dif/R-R（%）of left ventricle in AMI group were significantly higher than those of the control (P<0.05). The LAVmax, LAVpre, LAEF and LAAEF in the AMI group were significantly higher than those of the control (P<0.05). The LAVmin,LAPEF and the Tmsv16-SD/R-R（%） and Tmsv16-Dif/R-R（%） of left atrium in AMI group had no statistical difference from those of the control (P>0.05). Conclusion: RT-3DE can be used to evaluate the left atrium function and synchrony in patients with acute myocardial infarction.
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Received: 17 September 2018
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2018, Vol. 28 
