This study compares the procedural characteristics and effectivity of radiofrequency ablation and cryoablation in patients with atrial fibrillation that are 75 years or older.

Radiofrequency and cryoballon ablation have been shown to be comparable to each other in terms of safety and effectivity in patients with atrial fibrillation. However, elderly patients have been underrepresented in the previous studies. The number of older patients with atrial fibrillation is high and the number of who undergo an ablation procedure for atrial fibrillation increases steadily. This prospective randomized trial compares the effectivity (recurrency of atrial arrhythmias) and periprocedural characteristics of the two established ablation methods in patients who are 75 years or older.

Inclusion Criteria:

• Patients with recurrent symptomatic paroxysmal or persistent atrial fibrillation
• At the day of their inclusion in the study the patients have to have completed the 75th year of life

Exclusion Criteria:

• Dementia
• Presence of left atrial thrombus
• Left atrial volume> 50 ml/m²
• Renal failure (GFR≤ 30 ml/min)
• Comorbidity with an expected survival of 12 months or less.