Abstract:
:Platypnea-orthodeoxia is an uncommon syndrome that may occur due to the postpneumonectomy state, cirrhosis of the liver, recurrent pulmonary embolism, and intracardiac shunting. We describe a patient who was found to have a positional change in desaturation after being admitted for dehydration. Workup revealed an atrial septal defect with aneurysm. Following surgical repair, the orthodeoxia resolved. Different mechanisms explain positional desaturation, such as atriovenous malformations at the lung base of cirrhotic patients. In an atrial septal defect, the increased shunting of blood across a malformed septum in an upright position may cause orthodeoxia. This case highlights the necessity of heightened awareness of this syndrome and the need for documenting orthostatic changes in cases of severe hypoxemia.
journal_name
Chestjournal_title
Chestauthors
Acharya SS,Kartan Rdoi
10.1378/chest.118.3.871subject
Has Abstractpub_date
2000-09-01 00:00:00pages
871-4issue
3eissn
0012-3692issn
1931-3543pii
S0012-3692(15)36504-1journal_volume
118pub_type
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