Moderator band
Citation, DOI, disclosures and article data
Citation:
Morgan M, Bell D, Carroll D, et al. Moderator band. Reference article, Radiopaedia.org (Accessed on 26 Mar 2025) https://doi.org/10.53347/rID-31562
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rID:
31562
Article created:
Disclosures:
At the time the article was created Matt A. Morgan had no recorded disclosures.
View Matt A. Morgan's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Daniel J Bell had no recorded disclosures.
View Daniel J Bell's current disclosures
Revisions:
7 times, by
6 contributors -
see full revision history and disclosures
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Synonyms:
- Septomarginal trabecula
The moderator band, also called the septomarginal trabecula, is a consistent structure in the morphologic right ventricle and can be helpful as a landmark in situations where the ventricles may be ambiguous (i.e. in some forms of congenital heart disease).
The term "septomarginal" is descriptive since the muscle extends from the interventricular septum to the margin of the right ventricle, contacting/joining the base of the anterior papillary muscle.
The moderator band does not attach to the tricuspid valve, but acts as part of the electrical conduction pathway of the heart (part of the right bundle branch). Blood supply typically originates from septal perforating branches of the left anterior descending artery (LAD) which may subsequently anastomose with vessels derived from the right coronary circulation.
References
- 1. Fuster V, Walsh R, Harrington R. Hurst's the heart. McGraw-Hill Professional. ISBN:0071636463. Read it at Google Books - Find it at Amazon
- 2. Broderick LS, Brooks GN, Kuhlman JE. Anatomic pitfalls of the heart and pericardium. Radiographics. 2005;25 (2): 441-53. doi:10.1148/rg.252045075 - Pubmed citation
- 3. O'Brien JP, Srichai MB, Hecht EM et-al. Anatomy of the heart at multidetector CT: what the radiologist needs to know. Radiographics. 2007;27 (6): 1569-82. Radiographics (full text) - doi:10.1148/rg.276065747 - Pubmed citation
- 4. Prabhakar Rajiah, James MacNamara, Abhishek Chaturvedi, Ravi Ashwath, Nicholas L. Fulton, Harold Goerne. Bands in the Heart: Multimodality Imaging Review. (2019) RadioGraphics. 39 (5): 1238-1263. doi:10.1148/rg.2019180176 - Pubmed
- 5. Lee JY, Hur MS. Morphological classification of the moderator band and its relationship with the anterior papillary muscle. (2019) Anatomy & cell biology. 52 (1): 38-42. doi:10.5115/acb.2019.52.1.38 - Pubmed
- 6. Terpenning S, White CS. Imaging pitfalls, normal anatomy, and anatomical variants that can simulate disease on cardiac imaging as demonstrated on multidetector computed tomography. (2015) Acta radiologica short reports. 4 (1): 2047981614562443. doi:10.1177/2047981614562443 - Pubmed
- 7. Reig J, Albertí N, Petit M. Arterial vascularization of the human moderator band: an analysis of this structure's role as a collateral circulation route. (2000) Clinical anatomy (New York, N.Y.). 13 (4): 244-50. doi:10.1002/1098-2353(2000)13:4<244::AID-CA3>3.0.CO;2-H - Pubmed
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