Atrial septal aneurysm

Case contributed by Dr Matt A. Morgan


Incidentally found on a Cardiac CT for evaluation of the coronary arteries.

Patient Data

Age: 55 years
Gender: Male

There is a saccular outpouching of the interatrial septum from the left atrium into the right atrium. It measures 11 mm off the midline, with a 13 mm base.

Case 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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Case information

rID: 31500
Published: 14th Oct 2014
Last edited: 25th May 2020
System: Cardiac
Inclusion in quiz mode: Included
Institution: Johns Hopkins Hospitals

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