Right atrial appendage

Last revised by Francis Deng on 31 Oct 2021

Citation, DOI, disclosures and article data

Citation:

Deng F, Right atrial appendage. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-94402

DOI:

https://doi.org/10.53347/rID-94402

Permalink:

https://radiopaedia.org/articles/94402

rID:

94402

Article created:

31 Oct 2021, Francis Deng ◉

Disclosures:

At the time the article was created Francis Deng had no recorded disclosures.

View Francis Deng's current disclosures

Last revised:

31 Oct 2021, Francis Deng ◉

Disclosures:

At the time the article was last revised Francis Deng had no recorded disclosures.

View Francis Deng's current disclosures

Revisions:

1 time, by 1 contributor - see full revision history and disclosures

Systems:

Cardiac

Sections:

Anatomy

Tags:

stub

Synonyms:

Right auricule
Right auricle
Right atrial appendage (RAA)

The right atrial appendage, also known as the right auricule (TA) or auricle, is a trapezoidal pouch forming the anterosuperior part of the right atrium. Pacemaker/defibrillator leads are often placed at this site.

Gross anatomy

The right atrial appendage is delineated from the rest of the right atrium (the right atrial vestibule) by the crista terminalis. The structure wraps leftward and upward over the anterior surface of the aortic root ¹. The proximal antral part and the distal saccular part are divided by the tenia sagittalis and the walls are lined by pectinate muscles ².