Prospective Randomized Study on Clinical Effectiveness of Carvo-Tricuspid Isthmus Block in Patients With Paroxysmal Atrial Fibrillation

Prospective Randomized Study on Clinical Effectiveness of Carvo-Tricuspid Isthmus (CTI) Block in Patients with Paroxysmal Atrial Fibrillation (PAF) will be performed. Study will be composed with two arms including 4 pulmonary vein isolation and pulmonary vein isolation with CTI block. After that all patients will be followed up by HRS(Heart Rhythm Society) 2010 expert consensus guideline.

Inclusion Criteria:

• patients with documented AF
• Drug refractory AF
• Non-valvular AF
• No structural cardiac disease
• No intracardiac thrombi in cardiac CT and TEE

Exclusion Criteria:

• permanent AF refractory to electrical cardioversion
• LA size >55 mm as measured by echocardiography
• AF with valvular disease
• associated structural heart disease other than left ventricular hypertrophy
• prior AF ablation.