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Encyclopedia > Interventricular septum
Interventricular septum
Section of the heart showing the ventricular septum.
Interior of dorsal half of heart of human embryo of about thirty-five days. (Labeled as 'septum inferius')
Latin s. interventriculare cordis
Gray's subject #138 535
MeSH Heart+Septum
Dorlands/Elsevier s_08/12730379

Interventricular septum (or ventricular septum, or during development septum inferius) is the stout wall separating the lower chambers (the ventricles) of the heart from one another. Image File history File links Gray498. ... Image File history File links No higher resolution available. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Elseviers logo. ... In the heart, a ventricle is a heart chamber which collects blood from an atrium (another heart chamber that is smaller than a ventricle) and pumps it out of the heart. ... The heart and lungs, from an older edition of Grays Anatomy. ...


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. The right ventricle is one of four chambers (two atria and two ventricles) in the human heart. ... The ventricles are separated by two grooves, one of which, the anterior longitudinal sulcus, is situated on the sternocostal surface of the heart, close to its left margin, the other posterior longitudinal sulcus (posterior interventricular sulcus, inferior interventricular groove), on the diaphragmatic surface near the right margin. ...


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).

The portion of the ventricle immediately below the aortic orifice is termed the aortic vestibule, and possesses fibrous instead of muscular walls. ... This page is about the muscular organ, the Heart. ...

Disorders

A hole in the interventricular septum is termed a ventricular septal defect (VSD). A ventricular septal defect (or VSD) is a defect in the ventricular septum (the wall dividing the left and right ventricles of the heart). ...


External links


  Results from FactBites:
 
Text for Cardiovascular Congenital Abnormalities (1988 words)
This is understandable given the complex movements that are needed for the contribution to this structure from endocardial cushion tissue, muscular interventricular septal tissue and aorticopulmonary septal tissue.
The pars membranaceum defect of the interventricular septum occurs as the result of the abnormal contribution of endocardial cushion tissue, a lack of connective tissue from the muscular interventricular septum, or the lack of aorticopulmonary tissue.
This is due to the improper spiraling of the aorticopulmonary septum.
CHD and Pediatric Cardiology - Contact Us (2676 words)
Note that the outlet septum is attached to the remainder of the muscular interventricular septum antero-cephalad relative to the septomarginal trabeculation, the structure also called the septal band.
The muscular outlet septum, as in Slide 3, is attached antero-cephalad relative to the septomarginal trabeculation.
Posterior malalignment of the outlet septum can result in a ventricular septal defect in the same location (between the limbs of the septal band), but the outlet septum is typically a thin sliver protruding into (and lowering the 'roof' of) the left ventricular outflow tract.
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