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atrial septum

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
atrial septum [′ā·trē·əl ′sep·təm]
(anatomy)
The muscular wall between the atria of the heart. Also known as interatrial septum.


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4,10) These are intracavitary, are usually located in the left atrium (Figure 18) and are attached to the atrial septum.
[2,3] The sites of origin in the heart parallel the anatomic distribution of visceral autonomic paraganglionic tissue, chiefly arising from the roof of the atria and atrial septum and from the branchiomeric aortopulmonary paraganglia.
A doctor's examination revealed that a part of his atrial septum had begun to grow scar tissue, which obstructed blood flow.
 
 
 
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