Heart anatomy

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This article covers the anatomy of the heart.

Coronary arteries

  • Left main coronary artery (LMCA).
    • Left anterior descending coronary artery (LAD).
    • Left circumflex coronary artery (LCx).
  • Right coronary artery (RCA).

Less common

  • Ramus intermedius - middle branch of LMCA if it trifurcates (instead of bifurcates).[1]
    • Present in approx. 1/3 of patients.

Obscure terms

  • Plica transversae aortae = between aortic root & reflection pericardium.[2]
  • Vincula aortae (fold of Rindfleisch) = aorta & pulmonary artery attachment, site of rupture.[3]
  • Central fibrous body = fibrotic tissue that forms the membranous septum and part of the LVOT.[4]
    • The AV node lies adjacent to it. There is case report suggesting, if the AV node is found within the central fibrous body, it may lead to sudden death.[5]

Left ventricle vs. right ventricle

  • Left ventricle.
    • Smooth outflow tract.
  • Right ventricle.
    • Infundibulum.
    • Crista supraventricularis (AKA crista ventricularis) = muscular ridge in RVOT between tricuspid valve and pulmonary valve.[6]


  • Trabeculae carneae. (???)
  • Semilunar valve attachment. (???)

See also


  1. Kim, SY.; Seo, JB.; Do, KH.; Heo, JN.; Lee, JS.; Song, JW.; Choe, YH.; Kim, TH. et al. "Coronary artery anomalies: classification and ECG-gated multi-detector row CT findings with angiographic correlation.". Radiographics 26 (2): 317-33; discussion 333-4. doi:10.1148/rg.262055068. PMID 16549600. http://radiographics.rsna.org/content/26/2/317.full.
  2. Unger F, Rainer WG (December 1999). "The plica transversa aortae: an addendum to the anatomic nomenclature of the heart". Ann. Thorac. Surg. 68 (6): 2391. PMID 10617058. http://ats.ctsnetjournals.org/cgi/content/full/68/6/2391.
  3. URL: http://ats.ctsnetjournals.org/cgi/content/full/71/2/762-b. Accessed on: 16 September 2010.
  4. Ho SY (November 2002). "Anatomy of the mitral valve". Heart 88 Suppl 4: iv5–10. PMC 1876279. PMID 12369589. http://heart.bmj.com/content/88/suppl_4/iv5.full.
  5. James TN, Marshall TK (June 1976). "XVIII. Persistent fetal dispersion of the atrioventricular node and His bundle within the central fibrous body". Circulation 53 (6): 1026–34. PMID 1269117.
  6. URL: http://www.isachd.org/proglossary/index.php?&ob=c#crista%20ventricularis. Accessed on: 16 February 2011.

External links