Behzad Masood

Platypnea-Orthodeoxia Syndrome in a Frail Elderly Patient: It's Not Always Pneumonia

Platypnea-orthodeoxia syndrome (POS) is a rare condition characterized by positional dyspnea and arterial desaturation that worsens in the upright position and improves when supine. It is most commonly associated with intracardiac right-to-left shunting, often through a patent fo...