Atrial septal aneurysm

Discussion:

A small outpouching of the interatrial septum at the fossa ovalis is common.  

When the outpouching is termed "aneurysmal," however, varies according to the source with a range of 11-15 mm.

Atrial septal aneurysms have been associated patent foramen ovale and with an increased incidence of thromboembolic events. 

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