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Patent foramen ovale (PFO) is a common congenital atrial septal defect with an incidence of 15–35% in the adult population.
``In simplistic terms, a PFO is the result of incomplete closure of atrial tissue, whereas an ASD is the result of complete absence of such tissue between the right and left atrial heart chambers.''
Stroke is the major potential complication of PFO. People who have a PFO are slightly more likely to have a stroke than people who do not. A PFO is more likely to be the cause of stroke in a younger adult because younger people don't have as many risk factors for stroke from other causes.
PFO can occasionally result in complications. The most serious of these is stroke. Most people will not need treatment for a PFO. Some people receive treatment for PFO, especially if they have had a stroke due to a PFO.
In most affected people the defect was a large PFO, but in some there was a secundum ASD or both an ASD and PFO.
Patent foramen ovale (PFO) is a common congenital atrial septal defect with an incidence of 15–35% in the adult population.
Risk factors. The causes of atrial septal defects among most babies are unknown. Some babies have heart defects because of changes in their genes or chromosomes. A combination of genes and other risk factors may increase the risk for atrial septal defects.
While ASD represents a true defect in the fossa ovalis region with varying magnitude and direction of intracardiac shunting depending on the size of the defect and relative filling pressures of the ventricles, PFO is as a result of an incompetent fossa ovalis valve with up to 25% prevalence in the general population 1 ...
Transoesophageal echocardiography (TOE) is superior to transthoracic echocardiography (TTE) for the diagnosis of a PFO and delineation of its morphologic details (figs 1 and 2).
The patent foramen ovale (PFO) is a slitlike interatrial opening that is present in about 27% of the general population. It is 1 of the major causes of a cardiac right‐to‐left shunt (RLS). An atrial septal aneurysm (ASA) is a congenital bulging of the atrial septum involving the fossa ovalis region.