In human anatomy, superior epigastric veins are two or more

venae comitantes Vena comitans is Latin for accompanying vein. It refers to a vein that is usually paired, with both veins lying on the sides of an artery. They are found in close proximity to arteries so that the pulsations of the artery aid venous return. B ...

which accompany either superior epigastric artery before emptying into the internal thoracic vein. They participate in the drainage of the superior surface of the diaphragm.

Structure

Course

The superior epigastric vein originates from the internal thoracic vein. The superior epigastric veins first run between the sternal margin and the costal margin of the diaphragm, then enter the

rectus sheath The rectus sheath, also called the rectus fascia,. is formed by the aponeuroses of the transverse abdominal and the internal and external oblique muscles. It contains the rectus abdominis and pyramidalis muscles. Structure The rectus sheat ...

. They run inferiorly, coursing superficially to the fibrous layer forming the posterior leaflet of the rectus sheath, and deep to the

rectus abdominis muscle The rectus abdominis muscle, ( la, straight abdominal) also known as the "abdominal muscle" or simply the "abs", is a paired straight muscle. It is a paired muscle, separated by a midline band of connective tissue called the linea alba. It ex ...

. The superior epigastric veins are

of the superior epigastric artery, and mirror its course.

Distribution

The superior epigastric veins participate in the drainage of the superior surface of the diaphragm.

Fate

The superior epigastric veins drain into the internal thoracic vein.

References

External links