Clinical Research Directory

Inclusion Criteria:(1) Age ≥18 years; (2) Non-valvular, non-paroxysmal AF (within 5 years of the first diagnosis of AF) with recurrent atrial arrhythmia lasting for more than 24 hours after the first catheter ablation and not self-terminating; (3) Patients who are not taking AADs such as amiodarone, dronedarone, propafenone, etc. after the procedure, and who agree to receive AADs without contraindications to AADs; or patients who are taking AADs such as amiodarone, dronedarone, propafenone, etc. after the procedure, but have been off of them for more than 1 month. \- Exclusion Criteria:(1) Previous cardiac surgery, such as cardiac bypass grafting, mechanical valve or prosthetic valve replacement; (2) Combined cardiomyopathy (e.g. hypertrophic cardiomyopathy, dilated cardiomyopathy, ischaemic cardiomyopathy, etc.); (3) Cardiac ultrasound suggests that the diameter of the left atrium is ≥50mm or there are valvular changes in rheumatic heart disease; (4) Previous history of abnormal thyroid function; (5) Severe hepatic or renal insufficiency (eGFR \<15, Child Class 3), or history of renal dialysis; (6) Heart rate \<60 beats/minute, any degree of atrioventricular block, two-branch or three-branch block at the time of resumption of SR after catheter ablation; (7) Left ventricular ejection fraction \<40% or New York Heart Association (NYHA) class III-IV after catheter ablation; (8) Participation in a clinical trial of another drug or device during the same period; (9) Abnormalities or diseases that, in the opinion of the investigator, should be excluded from enrolment in this study. \-