Ostium secundum

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Ostium secundum
Days	33
Dorlands/Elsevier	o_09/12602025

The ostium secundum (or foramen secundum) is a foramen in the septum primum.

It should not be confused with the foramen ovale, which is a foramen in the septum secundum.

[edit] Clinical significance

An ostium secundum which persists at large size can be a source of atrial septal defects.^[1]

[edit] References

1. ^ ped/1686 at eMedicine

[edit] External links

• Embryology at Temple Heart98/heart97a/sld036
• CV183 at FPnotebook
• http://www.mayoclinic.org/atrial-septal-defect/types.html
• http://sprojects.mmi.mcgill.ca/embryology/cvs/ias.html
• http://staff.um.edu.mt/acus1/Heart-b.htm

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e Prenatal development/Mammalian development of circulatory system Vascular Blood island arteries: Dorsal aorta - Aortic arches - Vitelline arteries - Ductus arteriosus - Umbilical artery veins: Cardinal veins - Ducts of Cuvier - Vitelline veins - Ductus venosus - Umbilical vein Heart development Primitive heart tube: Truncus arteriosus - Bulbus cordis - Primitive ventricle - Primitive atrium - Sinus venosus Septum primum (Ostium primum, Ostium secundum) - Septum secundum (Foramen ovale) - other septa (Endocardial cushions/Septum intermedium, Aorticopulmonary septum) - Atrial canal