Pristipino C, Germonpré P, Toni D, et al. The following are key perspectives from the European position paper on the management of patients with patent foramen ovale (PFO).Pristipino C, Germonpré P, Toni D, et al. The following are key perspectives from the European position paper on the management of patients with patent foramen ovale (PFO). A patent foramen ovale or PFO is a defect in the wall between the two upper chambers of the heart. Three variants listed in the CtE dataset were the AMPLATZER PFO Occluder, the. AMPLATZER Septal Occluder and the AMPLATZER Cribriform;.