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Atrioventricular septum

The atrioventricular septum is a septum of the heart between the right atrium (RA) and the left ventricle (LV).[1][2]

Atrioventricular septum
Interior of heart. (AV septum not labeled, but region is visible.)
Coronal cross section of heart. Note how the septum between the RA and LV becomes membranous.
Details
Identifiers
Latinseptum atrioventriculare
TA98A12.1.00.016
TA23969
FMA7136
Anatomical terminology
[edit on Wikidata]

Although the name "atrioventricular septum" implies any septum between an atrium and a ventricle, in practice the divisions from RA to RV and from LA to LV are mediated by valves, not by septa. Also, there is usually no communication between the LA and the RV.

Structure edit

It has a membranous and muscular part.[3]

When considering only the membranous septum, it is also known as the "atrioventricular component of the membranous septum".[4]

Development edit

It is formed by the union of the dorsal AV cushion and ventral AV cushion.[5] This septum divides the atrioventricular canal.[6]

Clinical relevance edit

In some cases, defects can be identified with an echocardiogram.[7]

Incomplete formation of the endocardial cushions can lead to atrioventricular septal defects, such as an ostium primum defect.

See also edit

References edit

  1. ^ . Archived from the original on 2011-07-19. Retrieved 2009-10-11.
  2. ^ . Archived from the original on 2009-08-28. Retrieved 2009-10-11.
  3. ^ . Archived from the original on 2009-06-07. Retrieved 2009-10-11.
  4. ^ Phelps CM, Mengshol S, Ivy DD (December 2008). "A curious isolated cystic lesion of the membranous atrioventricular septum". Cardiol Young. 18 (6): 631–4. doi:10.1017/S104795110800276X. PMC 3118089. PMID 18950547.
  5. ^ Fix, James D.; James D., PhD. Fix; Dudek, Ronald W. (2005). Embryology. Hagerstwon, MD: Lippincott Williams & Wilkins. pp. 35. ISBN 0-7817-5726-6.
  6. ^ Kirby, Margaret L. (2007). Cardiac development. Oxford [Oxfordshire]: Oxford University Press. pp. 104. ISBN 978-0-19-517819-7.
  7. ^ Croti UA, Braile DM, Hassem Sobrinho S, Godoy MF (March 2007). "Case 2/2007: left atrial isomerism in the defect of partial atrioventricular septum". Rev Bras Cir Cardiovasc. 22 (1): 125–6. doi:10.1590/s0102-76382007000100023. PMID 17992316.

External links edit

    atrioventricular, septum, atrioventricular, septum, septum, heart, between, right, atrium, left, ventricle, interior, heart, septum, labeled, region, visible, coronal, cross, section, heart, note, septum, between, becomes, membranous, detailsidentifierslatinse. The atrioventricular septum is a septum of the heart between the right atrium RA and the left ventricle LV 1 2 Atrioventricular septumInterior of heart AV septum not labeled but region is visible Coronal cross section of heart Note how the septum between the RA and LV becomes membranous DetailsIdentifiersLatinseptum atrioventriculareTA98A12 1 00 016TA23969FMA7136Anatomical terminology edit on Wikidata Although the name atrioventricular septum implies any septum between an atrium and a ventricle in practice the divisions from RA to RV and from LA to LV are mediated by valves not by septa Also there is usually no communication between the LA and the RV Contents 1 Structure 1 1 Development 2 Clinical relevance 3 See also 4 References 5 External linksStructure editIt has a membranous and muscular part 3 When considering only the membranous septum it is also known as the atrioventricular component of the membranous septum 4 Development edit It is formed by the union of the dorsal AV cushion and ventral AV cushion 5 This septum divides the atrioventricular canal 6 Clinical relevance editIn some cases defects can be identified with an echocardiogram 7 Incomplete formation of the endocardial cushions can lead to atrioventricular septal defects such as an ostium primum defect See also editThis article uses anatomical terminology References edit Congenital Heart Disease When Chambers and Valves Are in Normal Sequence and Position Archived from the original on 2011 07 19 Retrieved 2009 10 11 Congenital Heart Disease Archived from the original on 2009 08 28 Retrieved 2009 10 11 Yale Congenital Heart Disease AV septal defects Archived from the original on 2009 06 07 Retrieved 2009 10 11 Phelps CM Mengshol S Ivy DD December 2008 A curious isolated cystic lesion of the membranous atrioventricular septum Cardiol Young 18 6 631 4 doi 10 1017 S104795110800276X PMC 3118089 PMID 18950547 Fix James D James D PhD Fix Dudek Ronald W 2005 Embryology Hagerstwon MD Lippincott Williams amp Wilkins pp 35 ISBN 0 7817 5726 6 Kirby Margaret L 2007 Cardiac development Oxford Oxfordshire Oxford University Press pp 104 ISBN 978 0 19 517819 7 Croti UA Braile DM Hassem Sobrinho S Godoy MF March 2007 Case 2 2007 left atrial isomerism in the defect of partial atrioventricular septum Rev Bras Cir Cardiovasc 22 1 125 6 doi 10 1590 s0102 76382007000100023 PMID 17992316 External links edithttps web archive org web 20091030081540 http www acc org membership community pediatric opinion apr03 Slide11 JPG Retrieved from https en wikipedia org w index php title Atrioventricular septum amp oldid 1121491457, wikipedia, wiki, book, books, library,

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