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You are here : AllRefer.com > Health > Diseases & Conditions > Patent foramen ovale

Patent foramen ovale

Alternate Names : PFO

Definition

While a baby grows in the womb, there is a normal opening between the left and right atria (upper chambers) of the heart. If this opening fails to close naturally soon after the baby is born, the hole is called patent foramen ovale (PFO).
Overview, Causes, & Risk Factors

A foramen ovale allows blood to bypass the lungs. A baby's lungs are not used when it grows in the womb, so the hole does not cause problems in an unborn infant. The opening is supposed to close soon after birth, but sometimes it does not. In about 1 out of 4 people, the opening never closes. If it does not, it is called a patent foramen ovale (PFO).

The cause of a PFO is unknown. There are no known risk factors.
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Heart, section through the middle
Heart, section through the middle

        
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Review Date : 12/28/2009
Reviewed By : David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc., and Kurt R. Schumacher, MD, Pediatric Cardiology, University of Michigan Congenital Heart Center, Ann Arbor, MI. Review provided by VeriMed Healthcare Network.

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