title: Paradoxical orthodeoxia in a patient with a large aortic aneurysm.
authors.forename: Yee-Tang
authors.initials: YT
authors.lastname: Wang
authors.forename: Soo-Chuan
authors.initials: SC
authors.lastname: Poh
mesh_terms: D000368:Aged; D017545:Aortic Aneurysm, Thoracic / Q000503:physiopathology*; D004417:Dyspnea / Q000209:etiology; D006801:Humans; D008297:Male; D010100:Oxygen / Q000097:blood*; D016683:Supine Position / Q000502:physiology*
chemical_list: D010100:Oxygen