The team at Arizona Heart Arrhythmia Associates can diagnose your structural heart defect and provide treatments to keep your heart working as it should. Most people with a patent foramen ovale don't need treatment.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 purpose of this study is to evaluate Patent Foramen Ovale (PFO) closure for migraine headache relief using the GORE® CARDIOFORM Septal Occluder. 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. Patent foramen ovale (PFO) is a hole between the left and right atria (upper chambers) of the heart. This hole exists in everyone before birth. The foramen ovale normally closes after birth. But sometimes it stays open.