foramen ovale

…passes through an opening, the foramen ovale, into the left atrium, and then to the left ventricle and around the body. Deoxygenated blood entering the anterior vena cava fills the right ventricle; however, instead of passing to the lungs, it is shunted through the ductus arteriosus, between the pulmonary and…

…a large opening, called the foramen ovale, in its lower part. Even though the two openings do not quite coincide in position, blood still passes through, from the right atrium to the left. At birth, increased blood pressure in the left atrium forces the primary partition against the secondary one,…

…defect is persistence of the foramen ovale, an opening in the atrial septum that is normal before birth and that should close at birth or shortly thereafter. A hole between the two sides of the heart produces an abnormal mixture of oxygenated blood from the pulmonary circulation and deoxygenated blood…