Abstract:Objective: To evaluate the left ventricular global and regional systolic and diastolic function in patients with slow coronary flow(SCF) by two-dimensional speckle tracking image(2D-STI). Methods: Forty patients with slow coronary flow underwent echocardiography, 40 persons with normal coronary angiography were selected as control group. The left ventricular end systolic diameter(LVDS), left ventricular end diastolic diameter(LVDD), left ventricular end systolic volume(LVESV), left ventricular end diastolic volume(LVEDV), left ventricular ejection fraction(LVEF) were measured by two-dimensional echocardiography and apical biplane Simpson’s method. The A and E peak flow velocity of mitral valve and E/A were obtained by pulsed-wave Doppler. The longitudinal peak strain(LSpeak), global longitudinal strain(GLS), TPSLS. Longitudinal, radial, circumferential strain peaks(LSpeak, RSpeak, CSpeak), and the time to peak strain (TPSLS, TPSRS, TPSCS), early diastolic peak strain rate(SRe), late diastolic peak strain rate(SRa) and train imaging diastolic index(SI-DI) and the strain curve of global and each segment were obtained by 2D-STI. These data were compared between groups. Results: The GLS of left ventricular in SCF group was decreased in different degrees and TPSLS was delayed compared with control group, the difference was statistically significant(P<0.05). The LSpeak, RSpeak, CSpeak in SCF segments were decreased and TPSLS, TPSRS, TPSCS were delayed compared with non-SCF segments, the difference was statistically significant(P<0.05). SRe, SRa and SI-DI were decreased in different degrees in slow coronary flow segments, the difference was statistically significant(P<0.05). Conclusion: 2D-STI can assess left ventricular global and regional systolic and diastolic function in patients with SCF.
赵春颖,李玉宏. 二维斑点追踪显像技术评价冠状动脉慢血流患者左心室收缩及舒张功能[J]. 中国临床医学影像杂志, 2019, 30(4): 267-270.
ZHAO Chun-ying, LI Yu-hong. Evaluation of left ventricular systolic and diastolic function in patients with slow coronary flow by two-dimensional speckle tracing technique. JOURNAL OF CHINA MEDICAL IMAGING, 2019, 30(4): 267-270.
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