论文部分内容阅读
目的:运用二维斑点追踪成像(STI)技术评价静息状态下冠心病患者左室长轴应变,探讨该参数在评判冠心病不同危险程度中的价值。方法:疑诊冠心病患者51例,根据冠状动脉造影结果将患者分为冠心病高危组、冠心病低危组及对照组,获得清晰的心尖四腔、三腔、两腔图像后存盘供脱机分析。测量参数:左室18节段平均长轴应变(MLS),基底水平、中段水平及心尖水平6个室壁节段平均长轴应变(PLS)。结果:与对照组比较,冠心病高危组基底水平、中段水平、心尖水平PLS及MLS均显著减低,冠心病低危组基底水平、中段水平PLS及MLS均显著减低,而心尖水平PLS较对照组无变化;与冠心病低危组比较,冠心病高危组基底水平、中段水平PLS及MLS显著减低。结论:STI能无创测量左室长轴应变的微小变化,为静息状态下准确评价不同危险程度冠心病患者心脏长轴收缩功能提供了新方法。
OBJECTIVE: To evaluate the long-axis strain of left ventricular in patients with coronary heart disease under rest state by two-dimensional speckle tracking imaging (STI) technique and to explore the value of this parameter in judging the different risk levels of coronary heart disease. Methods: Totally 51 patients with suspected coronary heart disease were divided into high risk group and low risk group according to the results of coronary angiography, and the control group was given a clear apical four-chamber, three-chamber and two-chamber images. Machine analysis. Measurement parameters: average long axis strain (MLS) of the 18 segments of the left ventricle, basal level, middle level, and apical level. Results: Compared with the control group, the basal level, middle level, apical level PLS and MLS were significantly decreased in the high risk group of coronary heart disease. The basal level, middle level PLS and MLS of the low risk group were significantly decreased, but the apical level PLS was lower than that of the control group No change; Compared with the low-risk group of coronary heart disease, high-risk group of coronary heart disease basal level, the middle level PLS and MLS decreased significantly. CONCLUSIONS: STI can be a noninvasive measurement of small changes in left ventricular long axis strain, providing a new method for accurate assessment of long axis systolic function in patients with coronary heart disease at different risk levels at rest.