“…3,4 Recently developed (3D-STE) is a new ultrasonic diagnostic technology, which can obtain real-time ventricular total volume data by tracking the movement of myocardial spots in three-dimensional space, which can more accurately reflect the movement and strain of myocardial in all directions, and then comprehensively evaluate the overall systolic and diastolic function of myocardium. 5,6 Studies have shown that the strain index of 3D-STE can accurately evaluate the cardiac structure and function, and the overall area strain value is highly correlated with the severity of heart failure patients, which is one of the important indicators to evaluate the left ventricular systolic function of patients. 7,8 In addition, Shin et al have recently confirmed that three-dimensional strain value has a certain correlation with left ventricular end-diastolic pressure (LVEDP) of patients with coronary heart disease, which has certain reference value for evaluating left ventricular diastolic function of patients, however, this study did not cover CHD patients with different degrees of left ventricular diastolic dysfunction due to a small number of cases and a large number of diseases.…”