title: A simple method of differentiating between atrial septal defect and patent foramen ovale.
authors.forename: T O
authors.initials: TO
authors.lastname: Cheng
mesh_terms: D002309:Cardiology / Q000379:methods*; D002407:Catheterization, Swan-Ganz; D003937:Diagnosis, Differential; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis*; D006801:Humans