Premature closure of foramen ovale results is :
B i.e., Right ventricular hyperophyBefore bih, foramen ovale allows most of the oxygenated blood entering the right atrium from inferior vena cava to pass into left atrium & prevents the opposite direction flow because the septum primum closes against relatively rigid septum secundum. After bih foramen ovale closes functionally and approximately at 3 months of age valve fuses with the septum secundum forming oval fassa. Premature closure leads to right ventricular hyperophyQ
Underdeveloped right atrium
Right ventricular hyperophy
Left ventricular hyperophy
Pulmonary stenosis
Right ventricular hyperophy