PLATYPNEA-ORTHODEOXIA SYNDROME: A RARE CAUSE OF UNEXPLAINED HYPOXIA

Platypnea-orthodeoxia (POD) is a rare syndrome described by dyspnea and hypoxemia while upright that improves on recumbence. It is associated with an intracardiac shunt, pulmonary AVM, ventilation-perfusion mismatch or a combination of these. A 53-year-old woman was referred for unexplained hypoxia