Patent foramen ovale (PFO) closure reduced the risk for recurrent ischemic stroke in most young and middle-aged adults with cryptogenic stroke but increased the risk for atrial fibrillation (AF) in a ...

In the womb, fetuses have an opening in the upper chambers of the heart known as a foramen ovale. While the opening is supposed to close naturally after birth, for many it never does. That's when it's ...