Association of LAAWV values with the GLS
LV GLS specifically captures the longitudinal shortening of the left ventricle, primarily reflecting the performance of myofibers in the vulnerable sub-endocardium. As a result, it can detect subtle changes in myocardial tissue and is capable of predicting the recovery of LVEF over time. Numerous other studies have demonstrated that LV GLS serves as an independent and important prognostic predictor, including hospital readmission, in patients with heart failure and reduced systolic function. Our study also suggests that in patients with heart failure and reduced ejection fraction, the velocity of the left atrial appendage also significantly decreases in parallel with the LV systolic function, similar to LV GLS. This observation reinforces the significance of LAAW velocity as a valuable parameter in assessing cardiac function and predicting clinical outcomes in heart failure patients with reduced ejection fraction.