1. Symposium Title: Pathophysiology of atrial fibrillation
Presentation Title: Atrial substrate properties in atrial fibrillation.

2. Symposium Title: Pathophysiology of atrial fibrillation
Presentation Title: Electrogram-based approach.

3. Symposium Title: Evidenced-based catheter ablation for atrial fibrillation: trigger or substrate, or both.
Presentation Title: Evidences supporting elimination of complex fractionated electrograms strategy for catheter ablation for atrial fibrillation: trigger or substrate, as the targets.