Interventricular septum

Interventricular septum
Interventricular septum
Gray498.png
Section of the heart showing the ventricular septum.
Gray467.png
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
Artery anterior interventricular branch of left coronary artery
MeSH Heart+Septum

Interventricular septum (or ventricular septum, or during development septum inferius), abbreviated IVS, is the stout wall separating the lower chambers (the ventricles) 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.

Contents

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).

Development

  • The muscular part of the interventricular septum derives from the bulboventricular flange which is developed due to differential growth of primitive ventricle and bulbous cordis. Membranous part has a neural crest origin which connects the upper free margin of the bulboventricular flange and anterior and posterior endocardial cussions of atrio ventricular valve. it also gets attached to lower border of spiral septum or the aortico pulmonary septum.

Disorders

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

Additional images

  • Heart normal short axis echo

External links

v · d · eAnatomy of torso, cardiovascular system: heart (TA A12.1, TH H3.09.01, GA 5.524)
General
Surface
Internal
Chambers
Layers

M: HRT

anat/phys/devp

noco/cong/tumr, sysi/epon, injr

proc, drug (C1A/1B/1C/1D), blte

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Look at other dictionaries:

  • Interventricular septum — The stout wall separating the lower chambers (the ventricles) of the heart from one another. A hole in the interventricular septum is termed a ventricular septal defect (VSD). * * * interventricular septum n the curved slanting wall that… …   Medical dictionary

  • interventricular septum of heart — septum interventriculare cordis [TA] the partition that separates the left ventricle from the right ventricle, consisting of a muscular and a membranous part; called also ventricular s. See illustration. Septum interventriculare cordis… …   Medical dictionary

  • interventricular septum — noun The stout wall separating the lower chambers (the ventricles) of the heart from one another …   Wiktionary

  • Septum (disambiguation) — Septum or septa may refer to: * Septum, a partition of two cavities or spaces * Septum (marine biology), in marine biology, a thin membrane separating each shell chamber in cephalopods that retained their external shell * Septum nasi or septum,… …   Wikipedia

  • interventricular sulcus — n either of the anterior and posterior grooves on the surface of the heart that lie over the interventricular septum and join at the apex called also interventricular groove …   Medical dictionary

  • Septum, cardiac — The cardiac septum is the dividing wall between the right and left sides of the heart. That portion of the septum that separates the two upper chambers (the right and left atria) of the heart is termed the atrial (or interatrial) septum while the …   Medical dictionary

  • Septum, heart — The septum of the heart is the dividing wall between the right and left sides of the heart. That portion of the septum that separates the two upper chambers (the right and left atria) of the heart is termed the atrial (or interatrial) septum… …   Medical dictionary

  • Septum, interventricular — The wall separating the lower chambers (the ventricles) of the heart. A hole in the interventricular septum is termed a ventricular septal defect (VSD) …   Medical dictionary

  • septum — noun a) A wall separating two cavities; a partition; as, the nasal septum. Deviated septum, a shift from the midline that commonly occurs in normal growth, is present in most adults. b) A partition that separates the cells of a fruit. See Also:… …   Wiktionary

  • interventricular — adjective Located between the ventricles of the heart See Also: interventricular foramen, interventricular septum …   Wiktionary

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