Catheter Ablation for Persistent Atrial Fibrillation: A Multi-centre, Prospective, Randomized Trial of Pulmonary Vein Isolation (PVI) versus PVI with Posterior Left Atrial Wall Isolation (PWI)

房颤是一种常见的心律失常。对于药物治疗后仍有症状的患者，一种称为导管消融的微创手术可以恢复正常的心律。这对于阵发性房颤患者是有效的。对于持续时间较长的房颤（持续性房颤），标准消融并不那么有用。在消融过程中增加另一个步骤，称为后壁隔离（PWI），可能会增加成功率。本研究将在持续性房颤中比较PWI和标准消融与单独标准消融

AF is a common heart rhythm disturbance. In patients with symptoms despite medication, a minimally invasive procedure called catheter ablation can restore normal rhythm. This is effective in patients with paroxysmal AF. In AF of longer duration (persistent AF), standard ablation is not as useful. Adding another step during ablation known as posterior wall isolation (PWI) may increase success rates. This study will compare PWI and standard ablation versus standard ablation alone in persistent AF