P1431Left atrial access in atrial fibrillation: patent foramen ovale versus transseptal puncture. (20th June 2017) - Sweda, R.; Haeberlin, A.; Servatius, H.; Seiler, J.; Noti, F.; Medeiros-Domingo, A.; Baldinger, S.; Lam, A.; Goulouti, E.; Fuhrer, J.; Roten, L.; Tanner, H.