A patent foramen ovale or PFO is a defect in the wall between the two upper chambers of the heart. This defect is actually an incomplete closure of the atrial wall that results in a flap or valve-like ...

Patent foramen ovale (PFO) is an interatrial communication at the level of oval fossa caused by the incomplete or missed fusion of the septum primum and septum secundum after birth. PFO has a ...

Practice parameter: recurrent stroke with patent foramen ovale and atrial septal aneurysm ... a statement for healthcare professionals from the American Heart Association/American Stroke ...

Medically reviewed by Richard N. Fogoros, MD The right atrium is one of the heart's upper chambers that plays a role in blood ...