Right atrial appendage
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| Right atrial appendage | |
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| Heart seen from above. (Right auricula labeled at upper right.) | |
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| Sternocostal surface of heart. (Right auricula visible at upper left.) | |
| Latin | auricula dextra |
| Gray's | subject #138 529 |
| Dorlands/Elsevier | a_73/12169666 |
The right atrial appendage (RAA) (right auricular appendix, right auricula, right auricle)[1] is a small conical muscular pouch attached to the right atrium of the heart.
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[edit] Anatomy
Its margins present a dentated edge. It projects from the upper and front part of the sinus forward and toward the left side, overlapping the root of the aorta.
The right auricle, along with the right atrial body, is lined with pectinate muscles that form a network of hills and furrows that give it a trabeculated surface.
[edit] Terminology
In older texts, the term "right auricle" was often used to describe the structure now known as the right atrium.
[edit] Clinical significance
It is possible for tachycardia to emerge from this structure.[2][3]
Rupture is rare.[4]
[edit] References
- ^ Gong D, Zhang Y, Cai B, et al (2008). "Characterization and Comparison of Na, K(+) and Ca(2+) Currents Between Myocytes from Human Atrial Right Appendage and Atrial Septum". Cell. Physiol. Biochem. 21 (5-6): 385–394. doi:. PMID 18453746.
- ^ Freixa X, Berruezo A, Mont L, et al (January 2008). "Characterization of focal right atrial appendage tachycardia". Europace 10 (1): 105–9. doi:. PMID 18077484.
- ^ Zhang T, Li XB, Wang YL, et al (November 2007). "Focal atrial tachycardia arising from the right atrial appendage: electrophysiologic and electrocardiographic characteristics and catheter ablation". Int. J. Clin. Pract.. doi:. PMID 18005038.
- ^ Figueiredo AM, Poggetti RS, Quintavalle FG, et al (2007). "Isolated right atrial appendage (RAA) rupture in blunt trauma--a case report and an anatomic study comparing RAA and right atrium (RA) wall thickness". World J Emerg Surg 2: 5. doi:. PMID 17302990.
[edit] See also
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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