This heart is an example of a condition called collateral supply, which, Dr. Oz says, is very common in athletes. In this heart, an artery was blocked off and in order to successfully deliver blood over to another part of the heart, it created an entirely new blood vessel. "The heart's wonderful," Dr. Oz says. "I'm so happy I study it every day because it allows us to figure out how adaptive the human body is. This heart found a way of keeping itself alive by creating a whole new collateral blood vessel to get there."

Gayle goes in for her heart scan. »