Patent foramen ovale: A patent foramen ovale (pfo) is a common type of atrial septal defect, which means there is a small hole in the wall separating the right atrium from the left atrium. Small pfos are usually inconsequential, whereas larger ones may require treatment.
Answered 4/12/2019
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Patent foramen ovale: This is a congenital opening between the right and left atria of the heart. It normally closes at birth, but stay open in some patients and may need to be closed with a device by a cardiologist or closed surgically by a cardiac surgeon.
Answered 4/17/2012
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