The aim of the present study is to assess whether left atrial roof ablation adds any benefit in the arrhythmia-free probability after paroxysmal atrial fibrillation ablation.

Inclusion Criteria:

• Drug-refractory paroxysmal atrial fibrillation

Exclusion Criteria:

• Hypo or hyperthyroidism
• Implantable defibrillation or pacemaker implanted
• Moderate or severe mitral valve disease or mitral prosthetic valve
• Ejection fraction less than 30%
• Left atrial anteroposterior diameter more than 50 mm.
• Previous atrial fibrillation ablation
• Left atrium thrombus
• Current infective disease or sepsis
• Pregnant women
• Current unstable angor
• Acute myocardial infarction in last 3 months
• Atrial fibrillation secondary to ionic disturbance, thyroids disease or secondary to any other reversible or non cardiovascular disease
• Reduced expectancy of life (less than 12 months)
• Patient participating in another clinical study that investigates a drug or device
• Psychologically unstable patient or denies to give informed consent