title: Pulmonary embolism: a new look at an old problem.
mesh_terms: D004417:Dyspnea / Q000150:complications; D005260:Female; D006493:Heparin / Q000008:administration & dosage; D006801:Humans; D000860:Hypoxia / Q000150:complications; D008875:Middle Aged; D001261:Pulmonary Atelectasis / Q000000981:diagnostic imaging; D011655:Pulmonary Embolism / Q000175:diagnosis* / Q000517:prevention & control; D011859:Radiography; D011877:Radionuclide Imaging
chemical_list: D006493:Heparin