Platypnea-orthodeoxia is a rare syndrome characterized by dyspnea and arterial deoxygenation, which is exacerbated in an upright position and relieved with recumbency. We report a case of platypnea-orthodeoxia in a 56-year-old male who was found to have bilateral lower-lobe pulmonary emboli. He did not have any evidence of an intracardiac…
Abstract:Platypnea-orthodeoxia (P-O) syndrome is an underdiagnosed condition characterized by dyspnea and deoxygenation accompanying a change from a recumbent to an upright position. It is caused by increased right-to-left shunting of blood on assuming an upright position. The diagnosis of this shunt is often challenging. A case where a diagnosis was…
We describe two unusual cases of platypnea. The first patient had chronic obstructive pulmonary disease, but platypnea did not respond to chronic obstructive pulmonary disease therapy. He was found to have multiple pulmonary emboli, and symptoms rapidly improved on anticoagulation therapy. The second patient had Parkinson disease and developed severe…
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