Proceedings (Baylor University. Medical Center)
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Proc (Bayl Univ Med Cent) · Apr 2019
Case ReportsPatent foramen ovale and ascending aortic aneurysm causing the platypnea-orthodeoxia syndrome.
Patent foramen ovale (PFO) is present in about 25% of the population. Platypnea-orthodeoxia syndrome (POS), which is dyspnea and hypoxemia in the upright position that is relieved when supine, is a rare manifestation of PFO. ⋯ Symptoms were resolved after undergoing percutaneous PFO closure. This case highlights the mechanism by which an ascending aortic aneurysm can alter hemodynamics through an existing PFO, leading to symptoms of a previously clinically insignificant PFO, and emphasizes how early recognition of POS allows for appropriate intervention.