title: The proper conduct of Valsalva maneuver in the detection of patent foramen ovale.
authors.forename: Tsung O
authors.initials: TO
authors.lastname: Cheng
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D020766:Intracranial Embolism / Q000209:etiology; D008875:Middle Aged; D011655:Pulmonary Embolism / Q000209:etiology; D014636:Valsalva Maneuver