Eustachian valve

The Eustachian valve (also known as the "valve of the inferior vena cava") is a ridge of variable thickness in the inferior right atrium. It is a remnant of a fetal structure that directed incoming oxygenated blood to the foramen ovale and away from the right atrium.  

Incomplete regression of this structure results in a thickened ridge at the IVC/RA junction, which can occasionally be thick enough to mimic thrombus or a right atrial mass on echocardiography, cardiac CT, or cardiac MRI.

A thickened Eustachian valve may also interfere with placement of an atrial septal defect or patent foramen ovale closure device.

Abdominal and pelvic anatomy
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Article information

rID: 31985
System: Cardiac
Section: Anatomy
Synonyms or Alternate Spellings:
  • Valve of the inferior vena cava
  • Eustachian ridge

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    Case 1: echocardiography
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