Hello and welcome to HealingWell. PFO size or morphology should not be the only criteria to decide if an intervention is required.
There is much on the internet as studies are in progress. You could ask your cardiologist for info re recent studies and outcomes.
~~Kitt~~Moderator: Anxiety, Osteoarthritis,
GERD/Heartburn and Heart/Cardiovascular Disease. "“Walk on with hope in your heart,
and you'll never walk alone."