Eustachian valve

(redirected from Valve of the inferior vena cava)
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Related to Valve of the inferior vena cava: Eustachian valve
(Anat.) a crescent-shaped fold of the lining membrane of the heart at the entrance of the vena cava inferior. It directs the blood towards the left auricle in the fetus, but is rudimentary and functionless in the adult.

See also: Eustachian

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Normally, the valve regresses by approximately 12 weeks gestation and leaves behind the crista terminalis superiorly and the eustachian valve of the inferior vena cava and the thebesian valve of the coronary sinus inferiorly.