title: A 58-year-old man with confusion and hypoxemia.
mesh_terms: D003221:Confusion / Q000209:etiology*; D006344:Heart Septal Defects, Atrial / Q000150:complications* / Q000503:physiopathology; D006801:Humans; D000860:Hypoxia / Q000209:etiology* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged