A case of orthodeoxia caused by an atrial septal aneurysm.

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

Chest

journal_title

Chest

authors

Acharya SS,Kartan R

doi

10.1378/chest.118.3.871

subject

Has Abstract

pub_date

2000-09-01 00:00:00

pages

871-4

issue

3

eissn

0012-3692

issn

1931-3543

pii

S0012-3692(15)36504-1

journal_volume

118

pub_type

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