A CASE OF SUDDEN ONSET OF PLATYPNEA ORTHODEOXIA SYNDROME CAUSED BY TRAUMATIC TRICUSPID REGURGITATION WITH RUPTURED CHORDAE TENDINEAE AFTER BLUNT CHEST TRAUMA

Platypnea orthodeoxia syndrome (POS) is a disease which is characterized by hypoxemia and dyspnea in the upright position, but an oxygen saturation level is nearly normal in the supine position. It is a rare disorder which is usually associated with right-to-left shunt through a patent foramen ovale