5 Conclusion
Our study found that left atrial phasic function was significantly impaired in patients with AF, and patients with persistent AF were more severely damaged than those with paroxysmal AF. The combination of RT-3DE and 2D-STI can more comprehensively evaluate left atrial structure and function. EAT thickness was significantly negatively correlated with left atrial reservoir function, booster function and conduit function. EAT thickness measured by TTE can effectively reflect the change trend of left atrial structure and function in patients with AF, thereby providing a certain reference for clinical practice.