ABSTRACT Platypnea-orthodeoxia syndrome, first described in 1949, is a rare clinical condition characterized by positional dyspnea and oxygen desaturation in the upright position that improves when lying down. Herein, we report the case of an 86-year-old patient who experienced episodes of dyspnea on assuming an upright position, which limited her daily activities. The patient’s oxygen saturation was 82% in the standing position and 91% in the supine position. During diagnostic investigation, a patent foramen ovale was identified using transesophageal echocardiography. […]
