Everyone is born with a hole in their heart which closes for most, but for some people, it doesn’t, and they may not know it until it causes major problems. MEDNAX-affiliated pediatric cardiologist, Dr. Jim Thompson, at Inova Fairfax Hospital in Fairfax, VA, says that about 20 percent of all adults have PFO. “Now most people have very small PFOs, they’re not clinically significant, and they’ll go their whole life without even knowing they have it, however if you look at young people who have strokes for no reason and doctors can’t find a reason that you had a stroke, about 50 percent of those patients have a PFO.”

View the full segment on NBC 4

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