A patent foramen ovale (PFO) is a hole in the heart that doesn’t close as expected after birth. Before a baby is born, they have a hole between the left and right sides of their heart. This hole, ...

Both traditional and less conventional risk factors contribute strongly to the risk of cryptogenic ischemic stroke in adults younger than 50 years, but their relative importance varies by the presence ...

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 ...