compared with 2 different ablation strategies clinical outcome for treating patients with paroxysmal atrial fibrillation

Conditions: Paroxysmal Atrial Fibrillation

Summary: atrial fibrillation (af) is the most serious atrial electrical activity disorders, is also one of the common tachyarrhythmias.circumferential pulmonary vein isolation (cpvi) is considered to be the cornerstone of paroxysmal atrial fibrillation ablation, but recently reported in the literature that pure cpvi treatment for paroxysmal atrial fibrillation the 5-year success rate as low as 46.6%, and the incidence of atrial reentry tachycardia is also high in the follow-up period. therefore it is necessary for us to explore whether the success rate of cpvi combined with leftatrium roofline ablation (cpvi + lara) for paroxysmal atrial fibrillation is higher than the pure cpvi.

atrial fibrillation (af) refers to the orderly loss of atrial electrical activity, replaced by rapid and disorderly atrial fibrillation wave, is the most acute atrial electrical activity disorders, is also one of the common tachyarrhythmias. so far, the mechanism of atrial fibrillation has not yet been completely clarified. at present, there are various mechanisms to participate in the occurrence and maintenance of atrial fibrillation, which mainly involves two aspects. one is the triggering factor of atrial fibrillation, and the other is the occurrence and maintenance of atrial fibrillation (substrate). trigger factors are varied, including sympathetic and parasympathetic stimulation, bradycardia, atrial premature beats or tachycardia, atrioventricular bypass and acute atrial pull, etc, which pulmonary vein electrical activity triggered the most common, but also is an most important theoretical basis for the radiofrequency catheter ablation of atrial fibrillation . substrate is a necessary condition for the onset and maintenance of atrial fibrillation. electrical remodeling and structural remodeling are by shortening the atrial effective refractory period. atrial dilatation and atrial fibrosis play a major role in the formation of atrial fibrillation reentry.circumferential pulmonary vein isolation (cpvi) is considered to be the cornerstone of paroxysmal atrial fibrillation ablation, but recently reported in the literature that pure cpvi treatment for paroxysmal atrial fibrillation the 5-year success rate as low as 46.6%, and the incidence of atrial reentry tachycardia is also high in the follow-up period. therefore it is necessary for us to explore whether the success rate of cpvi combined with leftatrium roofline ablation (cpvi + lara) for paroxysmal atrial fibrillation is higher than the pure cpvi.

Eligibility criteria:
inclusion criteria: - (1)patients between 18-80 year-old with paroxysmal atrial fibrillation have radio frequency ablation operation indication and are willing to require af ablation therapy. (2)voluntary consent of informed consent (3)no af ablation history before admission exclusion criteria: * (1) permanent or persistent af (2) the diameter of left atrium \>50mm (3) previous af/afl/at radio frequency ablation (4) congenital heart disease and/or cardiac surgical procedures (5) af with rheumatic valvular disease (6) lv ejection fraction \<45% (7) intracardiac thrombi

Keywords: paroxysmal atrial fibrillation circumferential pulmonary vein isolation(cpvi) leftatrium roofline ablation(lara) longterm success rate