Eustachian Valve on RV Inflow View of Echocardiogram

Echocardiography of a prominent Eustachian Valve as seen on Right ventricular (RV) Inflow View.

Eustachian Valve
Eustachian Valve (Arrow) as seen on right ventricular (RV) Inflow View

What is Eustachian Valve?

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