Sinoatrial nodal artery
Citation, DOI, disclosures and article data
Citation:
Benjabutr D, Weerakkody Y, Hacking C, et al. Sinoatrial nodal artery. Reference article, Radiopaedia.org (Accessed on 12 Dec 2024) https://doi.org/10.53347/rID-52834
Permalink:
rID:
52834
Article created:
26 Apr 2017,
David Benjabutr
Disclosures:
At the time the article was created David Benjabutr had no recorded disclosures.
View David Benjabutr's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Yuranga Weerakkody had no recorded disclosures.
View Yuranga Weerakkody's current disclosures
Revisions:
7 times, by
4 contributors -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- SA nodal artery
- Sinoatrial nodal branch
The sinoatrial (SA) nodal artery is the small artery that supplies the sinoatrial (SA) node of the heart (the pacemaker).
Gross anatomy
Origin
Right coronary artery in 60% of cases and the left coronary artery in 40% of cases.
Course
The artery turns posteriorly below the superior vena caval opening.
Variant anatomy
The SA node can arise from its own opening in the anterior aortic sinus.
A study of 516 SA nodal arteries using MDCT found 96.4% of arteries were single whilst 3.6% were double. In this study only 53.4% of SA nodal arteries originated from the right coronary artery with 43% originating from the left circumflex artery.
Other variants include
- S-shaped variant 4
References
- 1. Song YS, Lee W, Park EA, Chung JW, Park JH. Anatomy of the sinoatrial nodal branch in Korean population: imaging with MDCT. (2012) Korean journal of radiology. 13 (5): 572-8. doi:10.3348/kjr.2012.13.5.572 - Pubmed
- 2. Villa AD, Sammut E, Nair A, Rajani R, Bonamini R, Chiribiri A. Coronary artery anomalies overview: The normal and the abnormal. (2016) World journal of radiology. 8 (6): 537-55. doi:10.4329/wjr.v8.i6.537 - Pubmed
- 3. Vikse J, Henry BM, Roy J, Ramakrishnan PK, Hsieh WC, Walocha JA, Tomaszewski KA. Anatomical Variations in the Sinoatrial Nodal Artery: A Meta-Analysis and Clinical Considerations. (2016) PloS one. 11 (2): e0148331. doi:10.1371/journal.pone.0148331 - Pubmed
- 4. Saremi F, Channual S, Abolhoda A, Gurudevan SV, Narula J, Milliken JC. MDCT of the S-shaped sinoatrial node artery. (2008) AJR. American journal of roentgenology. 190 (6): 1569-75. doi:10.2214/AJR.07.3127 - Pubmed
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