Is it dangerous for adults to have a patent foramen ovale 3mm?

Adult patent foramen ovale 3mm is usually harmful.

Adult patent foramen ovale 3mm may affect the normal function of the heart, so that cardiac function is reduced, arterial and venous branches are affected, resulting in cardiac enlargement. Moreover, patent foramen ovale 3mm can also affect the blood flow of the heart, so that the heart blood supply is insufficient, leading to organ ischemia and hypoxia in the body, when the hypoxia is more serious, it can also lead to brain tissue damage, stimulate the central nervous system of the brain, and then cause stroke. Therefore, patent foramen ovale 3mm in adults is generally harmful to the health of the body.