Cardiac Stunning After Electrical Cardioversion

Inclusion Criteria: * Patients with atrial fibrillation * Patients with persistent or symptomatic atrial fibrillation who are candidates for electrical cardioversion * Patients eligible for anticoagulation therapy for thromboembolism prevention before and after the procedure * Patients who can understand and provide written informed consent Exclusion Criteria: * Patients under 18 years of age or over 80 years of age * Patients who do not consent to participate in the study * Patients with severe coronary artery stenosis * Patients with severe hepatic dysfunction * Patients with severe renal dysfunction * Patients with severe valvular heart disease * Patients with a high risk of severe bleeding * Patients with a history of atrial fibrillation-related catheter ablation or cardiac surgery * Patients with an expected life expectancy of less than 1 year * Potentially pregnant individuals * Patients deemed unsuitable for the study by the investigator