Impact of Periodontal Therapy on AF Recurrence Post-Ablation in High-Inflammatory Burden Patients

Inclusion Criteria: \- Age ≥18 years. Diagnosed with atrial fibrillation (AF) and undergoing first-time catheter ablation. Diagnosed with periodontitis (2017 World Workshop classification) and periodontal inflamed surface area (PISA) \>500 mm². Willing and able to provide written informed consent. Exclusion Criteria: \- Requiring periodontal surgical intervention, e.g., flap surgery, bone grafting. Non-surgical periodontal therapy (e.g., scaling and root planing) within the past 6 months. Active systemic infection, e.g., sepsis, tuberculosis. Current immunosuppressive therapy, e.g., post-transplant medications, long-term corticosteroids. Chronic hepatitis B or HIV infection. Chronic systemic antibiotic use (\>4 weeks). Pregnancy or lactation. Anticipated survival \<12 months.