Study limitations
The present study still existed some limitations. First of all, 3D-STE is not suitable for image acquisition of patients with irregular heart rhythm, and it requires the complete image information, which makes the loss of image information for patients with oversized heart. In addition, the high frame rate can accurately reflect the instantaneous motion information of the myocardium, while the low frame rate is adverse to real-time response of myocardial motion information. Furthermore, we had a relatively small study population, so it is necessary to expand the sample size for further study in the future.