Participants were 1,100 stroke-free subjects over the age of 39 years who were tested for PFO presence by contrast-enhanced transthoracic echocardiography ... with patent foramen ovale and atrial ...

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 ...