The Value of Two-dimensional Speckle Tracking Imaging Technology for Different Degrees of Coronary Artery Stenosis
Objective:Coronary artery disease is the world's leading lethal disease.Early assessment of the degree of coronary artery stenosis can significantly improve patient survival.By using two-dimensional speckle tracking imaging technology,the value of overall left ventricular longitudinal strain in the diagnosis of different degrees of coronary artery stenosis is explored.Methods:Sixty one suspected coronary artery disease patients admitted to our hospital from June 2023 to January 2024 were selected as the study subjects,all of whom underwent coronary angiography,conventional echocardiography,and two-dimensional speckle tracking imaging technology to measure the global longitudinal strain(GLS)of the left ventricle,while also observing the color changes of the polar map.The results of coronary angiography were used as the gold standard:divided into three groups according to the degree of stenosis in one or more coronary artery lumens or large branches,with less than 50％ being the control group,between 50％～70％ being the low-risk group,and more than 70％ being the high-risk group.The three groups were compared in terms of conventional ultrasound parameters,GLS of the left ventricle,and color changes in the polar map for diagnosis.The value of different degrees of coronary artery stenosis with nor-mal ventricular wall movement.Results:There was no statistically significant difference in conventional ultrasound parameters(P＞0.05);The GLS of the left ventricle decreases with the severity of coronary ar-tery stenosis,and the difference is statistically significant(P＜0.05).The polar map becomes lighter in color as the degree of coronary artery stenosis worsens.Conclusion:Coronary artery disease patients with normal wall motion,two-dimensional speckle tracking imaging technology can sensitively detect myocar-dial ischemia,and the GLS of the left ventricle decreases with the severity of coronary artery stenosis.This technology may provide a new diagnostic tool for clinical doctors.
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