SCMC Foramen Ovale e Closure occurs in two stages Functional closure occurs when LA pressure higher than RA pressure e This is reversible in the presence of hypoxemia or hypovolemia Permanent closure occurs in 5-7 monthsForamen Ovale ⚫ Closure occurs in two stages – Functional closure occurs when LA pressure higher than RA pressure ⚫ This is reversible in the presence of hypoxemia or hypovolemia – Permanent closure occurs in 5-7 months