Pulmonary vein morphology in patients with paroxysmal atrial fibrillation initiated by ectopic beats originating from the pulmonary veins: Implications for catheter ablation

Wei Shiang Lin, V. S. Prakash, Ching T. Tai, Ming-Hsiung Hsieh, Chin Feng Tsai, Wen Chung Yu, Yung-Kuo Lin, Yu An Ding, Mau Song Chang, Shih A. Chen