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What is an Atrial Septal Aneurysm?

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Updated June 20, 2014

Photo @ ADAM

Photo @ ADAM

About.com
Definition: An abnormally enlarged, bulging and mobile atrial septum. The atrial septum is the membrane that separates the left and the right upper chambers of the heart (the atria). By definition, when the atrial septum travels abnormally in to either or both of the atria with each heart beat, it is considered to have an aneurysm.
Also Known As: ASA
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