Patent foramen ovale

A patent foramen ovale (PFO) is a hole in the heart that didn't close the way it should after birth.

During fetal development, a small flap-like opening — the foramen ovale (foh-RAY-mun oh-VAY-lee) — is usually present between the right and left upper chambers of the heart. It normally closes during infancy. When the foramen ovale doesn't close, it's called a patent foramen ovale.

Although it's common to have a patent formen ovale, most people with the condition never know they have it. A patent foramen ovale is often discovered during tests for other problems. Learning that you have a patent foramen ovale is understandably worrisome, but most people never need treatment for this disorder.

Symptoms Causes Complications

Most people with a patent foramen ovale don't know they have it, because it's usually a hidden condition that doesn't create signs or symptoms.

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