斑点追踪显像、实时三维超声心动图与门控心肌灌注SPECT显像评价左心室收缩同步性的相关性研究

目的 探讨斑点追踪显像(speckle tracking imaging,STI)、实时三维超声心动图(real-time three-dimensional echocardiography,RT-3DE)与门控心肌灌注SPECT显像(gated myocardial perfusion single-photon emission computed tomography,GMPS)评价冠心病患者左室收缩同步性的相关性.方法 13例冠心病患者进行STI及RT-3DE检查,获得左室12节段径向应变及圆周应变达峰时间标准差(Trs12-SD,Tcs12-SD),左室16节段纵向应变达峰时间标准差(Tls16-SD),左室16节段和12节段达最小容积时间标准差(Tmsv16-SD,Tmsv12-SD).测量结果与GMPS评价左室收缩同步性参数进行比较.结果 STI参数Trs12-SD与GMPS参数相位标准差、相位宽度正相关(分别为r=0.800,P＜0.05;r=0.607,P＜0.05)；RT-3DE参数Tmsv16-SD与GMPS参数相位标准差、相位宽度相关性更好(分别为r=0.847,P=0.001;r=0.890,P＜0.001).结论 RT-3DE参数较STI参数与GMPS参数的相关性更好,提示RT-3DE参数有望成为评价左心室收缩同步性的理想指标.

Study on the correlection between echocardiographic novels and gated myocardial perfusion single-photonemission computed tomography in evaluating left ventricular systolic synchrony

Objective To evaluate left ventricular systolic synchrony in patients with coronary artery disease (CAD) by speckle tracking imaging (STI) and real-time three-dimensional echocardiography (RT3DE) and investigate the correlation with ECG-gated myocardial perfusion single-photon emission computed tomography (GMPS).Methods A total of thirteen patients with CAD diagnosed by coronary angiography underwent STI and RT-3DE examinations.The data was analysed off-line using Qlab 8.0 software.STI systolic synchrony indexes included the standard deviation of times to peak strain in radial and circumferial direction in 12 left ventricular segments (Trs12-SD and Tcs12-SD),the standard deviation of times to peak longitudinal strain in 16 left ventricular segments (Tls16-SD).RT-3DE systolic synchrony indexes included the standard deviation of times to the minimum systolic volume in 16 and 12 left ventricular segments (Tmsv16-SD and Tmsv12-SD).GMPS was performed within one week before or after echocardiography.Phase analysis was performed offline using Emory Cardiac Toolbox software.Peak phase,phase SD,bandwidth,skewness and kurtosis were calculated.Results Trs12-SD derived from STI had a positive correlation with phase SD and bandwidth ( r =0.800,P ＜0.05 ; r =0.607,P ＜0.05).Tmsv16-SD derived from RT-3DE had a better positive correlation with phase SD and bandwidth ( r =0.847,P =0.001 ; r =0.890,P ＜0.001).Conclusions Tmsv16-SD derived from RT-3DE had a better correlation with GMPS parameters than STI parameters.RT-3DE assessment of left ventricular systolic parameters is expected to become the ideal synchronization indicator.