View source for Interventricular septum

{{Infobox Anatomy |
  Name         = Interventricular septum |
  Latin        = s. interventriculare cordis |
  GraySubject  = 138 |
  GrayPage     = 535 |
  Image        = Gray498.png |
  Caption      = Section of the heart showing the ventricular septum. |
  Image2       = Gray467.png |
  Caption2     = Interior of dorsal half of heart of human embryo of about thirty-five days. (Labeled as 'septum inferius') |
  System       = |
  Artery       = [[anterior interventricular branch of left coronary artery]] | 
  MeshName     = Heart+Septum |
  MeshNumber   = A07.541.459 |
  DorlandsPre  = s_08 |
  DorlandsSuf  = 12730379  |
}}
'''Interventricular septum''' (or '''ventricular septum''', or during development '''septum inferius'''), abbreviated IVS, is the stout wall separating the lower chambers (the [[Ventricle (heart)|ventricle]]s) of the [[heart]] from one another. 

The ventricular septum is directed obliquely backward and to the right, and is curved with the convexity toward the [[right ventricle]]: its margins correspond with the anterior and [[posterior longitudinal sulci]]. 

==Portions==
* The greater portion of it is thick and muscular and constitutes the '''muscular ventricular septum'''.

* Its upper and posterior part, which separates the [[aortic vestibule]] from the lower part of the [[right atrium]] and upper part of the right ventricle, is thin and fibrous, and is termed the '''membranous ventricular septum''' ('''septum membranaceum'''). 

==Disorders==
A hole in the interventricular septum is termed a [[ventricular septal defect]] (VSD).

==Additional images==
<gallery>
 Image:Heart normal short axis echo.svg|Heart normal short axis echo
</gallery>

==External links==
{{wiktionary}}
* {{eMedicineDictionary|Interventricular+septum}}
* {{OklahomaHistology|128_06}} - "Heart and semilunar valve"

{{Heart}}


[[Category:Cardiovascular system]]

[[es:Tabique interventricular]]
[[ja:心室中隔]]
[[Category:2Fix]]