We welcome an incredibly accomplished new guest, Arthur Ng, MD, a cardiac surgeon at Virtua to explain what the "hole in the heart" Kris Letang, defenseman for the Pittsburgh Penguins, has been diagnosed with, and why he needed a procedure at the end of the season to correct it. Patent foramen ovale is one kind of hole in the heart and we learn just how shockingly common it is and why Letang needed a procedure to close it. We have previously discussed Letang coming back from two strokes, and now we know why. This is outlier sports medicine that you may not have ever learned about previously!