Eustachian valve

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Related to Eustachian valve: thebesian 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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In our study, transthoracic echocardiography misinterpreted a Eustachian valve as cardiac mass in one patient and was not able to differentiate thrombi from cardiac masses in 3 patients.
It is also unclear whether to ascribe any pathogenetic role to the eustachian valve crossing the IVC.