title: The diagnosis of acute pulmonary embolism.
mesh_terms: D000208:Acute Disease; D000368:Aged; D002245:Carbon Dioxide / Q000097:blood; D002908:Chronic Disease; D004562:Electrocardiography; D006801:Humans; D007866:Leg / Q000098:blood supply; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D010690:Phlebography; D011651:Pulmonary Artery / Q000000981:diagnostic imaging; D011655:Pulmonary Embolism / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011877:Radionuclide Imaging; D012008:Recurrence; D013924:Thrombophlebitis / Q000175:diagnosis
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen