Do 'difficult to identify' pulmonary vein connections explain continuing high recurrence rates after atrial fibrillation ablation?

1. García-Bolao, I.
2. Ballesteros, G.
3. Ramos Ardanaz, P.
4. Vives, E.
5. Neglia, R.
6. Menéndez, D.
7. Erkiaga Aio, A.
8. De La Fuente, A.