Many people don't need treatment unless they're at risk of stroke or blood clots. However, it may cause serious complications under certain circumstances.Patent foramen transcatheter repair is a procedure to fix this hole in the heart. Normally, the atrial septum separates the right and left atria. Learn more about the causes and complications of this condition in which a hole in the heart doesn't close the way it should after birth. The foramen ovale is a hole in the wall between the left and right atria of every human fetus. This hole allows blood to bypass the fetal lungs. Patients who do need treatment may take medicines or have a percutaneous coronary intervention to close the PFO. In more serious cases, surgery may be needed. A patent foramen ovale doesn't need treatment unless it has caused a problem like a stroke or a TIA.