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Article in Japanese
Abstract
Case Report
A case of platypnea-orthodeoxia syndrome with interstitial pneumonia
Katsuhiro Yoshimuraa Koushi Yokomuraa Minako Omaea Yoshiko Satoa Hayato Ohtanib Takafumi Sudac Kingo Chidac
aDepartment of Respiratory Medicine, Respiratory Disease Center, Seirei Mikatahara Hospital
bDepartment of Cardiovascular Medicine, Seirei Mikatahara Hospital
cSecond Department of Internal Medicine, Hamamatsu University School of Medicine
ABSTRACT
A 73-year-old woman with interstitial pneumonia was admitted with dyspnea and hypoxemia. Chest CT and a pulmonary function test showed no progression of the interstitial pneumonia, and heart failure and pulmonary embolism were excluded. After admission, the patient had dyspnea and hypoxemia in a sitting position, but not in exertion or in a supine position. A transesophageal echocardiography revealed blood flow through the foramen ovale in a sitting position. We diagnosed platypnea-orthodeoxia syndrome (POS) because of an interatrial right-to-left shunt. POS is defined as dyspnea and hypoxemia induced by the sitting position. In this case, she had an elongated ascending aorta and kyphosis, which may cause abnormal orientation of the patent foramen ovale. POS is a rare disease, and careful examination at what position and when dyspnea and hypoxemia appear is an important clue in the diagnosis of hypoxemia.
KEYWORDS
Platypnea-orthodeoxia syndrome Patent foramen ovale Hypoxemia
Received 31 Jan 2013 ／ Accepted 20 May 2013
AJRS, 2(5): 593-597, 2013
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