| Crista terminalis | |
|---|---|
 Interior of the heart, frontal view (crista terminalis labeled on the left, second from the top) | |
 | |
| Details | |
| Identifiers | |
| Latin | crista terminalis atrii dextri |
| TA98 | A12.1.01.003 |
| TA2 | 4025 |
| FMA | 9236 |
| Anatomical terminology | |
The crista terminalis (also known as the terminal crest,[citation needed] or crista terminalis of His[1]) is a vertical ridge on the[2]: 56 posterolateral[3] inner surface of the adult right atrium extending between the superior vena cava, and the inferior vena cava.[2]: 56 The crista terminalis denotes where the junction of the embryologic sinus venosus and the right atrium occurred during embryonic development.[3] It forms a boundary between the rough[2]: 56 trabecular[4] portion and the smooth, sinus venosus-derived portion (sinus venarum) of the internal surface of the right atrium. The sinoatrial node is located within the crista terminalis.[2]: 56
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099 Eustachian Valve Crista Terminalis
Transcription
Anatomy
The crista terminalis generally takes the form of a smooth-surfaced, crescent-shaped thickened portion of heart muscle at the opening into the right atrial appendage.[citation needed] It consists of fibromuscular tissue.[3]
Features
On the external aspect of the right atrium, corresponding to the crista terminalis, is a groove - the terminal sulcus.[citation needed]
The crista terminalis provides the origin for the pectinate muscles.[citation needed]
The sinoatrial node is located in the superior part of the crista terminalis at the junction of the right atrium, and superior vena cava.[2]: 60
Development
During the development of the human heart, the right horn and transverse portion of the sinus venosus ultimately become incorporated with and form a part of the adult right atrium.[1] The right sinus horn[4] of the sinus venosus develops into the sinus venarum; in the adult right atrium, the portion of right atrium derived from the sinus venosus has a smooth inner surface.[2]: 56
Clinical significance
A prominent crista terminalis may be mistaken for a cardiac mass during heart imaging; a prominent crista terminalis appears as a hyperechoic ridge on echocardiography, and homogenous to adjacent atrial wall on CT and MRI.[3]
See also
References
- ^ a b Gray, Henry (1918). Gray's Anatomy (20th ed.). p. 509.
- ^ a b c d e f Morton, David A. (2019). The Big Picture: Gross Anatomy. K. Bo Foreman, Kurt H. Albertine (2nd ed.). New York. ISBN 978-1-259-86264-9. OCLC 1044772257.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ a b c d Pieper, Matthew S.; Araoz, Philip A. (2016-01-01), Herrmann, Joerg (ed.), "Chapter 5 - Cardiac Tumors: Imaging", Clinical Cardio-Oncology, Elsevier, pp. 77–90, doi:10.1016/b978-0-323-44227-5.00005-3, ISBN 978-0-323-44227-5, retrieved 2020-11-17
- ^ a b T. W., Sadler (2018). Langman's Medical Embryology (14th ed.). Philadelphia. p. 188. ISBN 978-1-4963-8390-7. OCLC 1042400100.
{{cite book}}: CS1 maint: location missing publisher (link)
External links
- Anatomy photo:20:13-0106 at the SUNY Downstate Medical Center - "Heart: Chamber of Right Atrium"
- Atlas image: ht_rt_atrium at the University of Michigan Health System - "Right atrium, internal structure, anterior view"
- Diagram at ctsnet.org
This page was last edited on 8 April 2024, at 21:53