Valve of foramen ovale | definition of valve of foramen ovale by Medical dictionary
valve of foramen ovale
valve of fo·ra·men o·va·le [TA]
a fold projecting into the left atrium from the margin of the foramen ovale in the fetus; when, with beginning inspiration, the blood pressure within the left atrium increases, the valve closes and its edges become adherent to the margin of the foramen ovale, occluding it.
References in periodicals archive
High right atrial (RA) pressure in fetal life keeps the valve of foramen ovale
High right atrial pressure in the fetus keeps the valve of foramen ovale open.
The combination of these two factors keeps the valve of foramen ovale closed.