title: Uncommon late presentation of platypnea-orthodeoxia syndrome.
authors.affiliation: Division of Cardiology, Ospedale San Paolo, University of Milan, Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Toffetti
authors.affiliation: Division of Cardiology, Ospedale San Paolo, University of Milan, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Centola
authors.affiliation: Division of Cardiology, Ospedale San Paolo, University of Milan, Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Massironi
authors.affiliation: Divison of Internal Medicine, Ospedale San Paolo, Italy.
authors.forename: Cristina
authors.initials: C
authors.lastname: Pipia
authors.affiliation: Division of Respiratory Medicine, University of Milan, Italy.
authors.forename: Fabiano
authors.initials: F
authors.lastname: Di Marco
authors.affiliation: Division of Cardiology, Azienda Ospedaliera "Luigi Sacco", Milan, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Colombo
authors.affiliation: Division of Cardiology, Azienda Ospedaliera "Luigi Sacco", Milan, Italy.
authors.forename: Emanuela
authors.initials: E
authors.lastname: Piccaluga
keywords: Patent foramen ovale; Platypnea-orthodeoxia; The elderly