Patent foramen ovale atent fairly common foramen ovale Hidden condition Left No obvious symptoms atrium Riaht Left atrium pressure higher atrium than right, the potent opening is physiological closed Reason for the opening to stay patent, and not fused afterbirth remains unclear No treatment is needed in most cases• Fairly common • Hidden condition • No obvious symptoms • Left atrium pressure higher than right, the potent opening is physiologically closed • Reason for the opening to stay patent, and not fused afterbirth remains unclear. • No treatment is needed in most cases Patent foramen ovale