Hmmmm...that 2006 article, concerning transfusion contracts for JW heart transplant recipients, could explain why this little item from Duke Hospital has significance.
Even though the first heart transplant for a JW was done in 1986, the medical literature has very few cases that follow that. I could find this one published in 1990, of five JW heart transplants in Houston Texas, the heartland of Denton Cooley:
http://jamanetwork.com/journals/jamasurgery/article-abstract/594899
Lots of other transplants in the years that follow, but no hearts.
Could it be that the ethical considerations that were highlighted in the journal article I linked were responsible for the silence in published medical journals for heart transplants in JWs for the past 15+ years? And that, indeed, a JW getting a heart is a big deal?
It isn't so much that a heart transplant is possible medically using bloodless methods. That is old news. Of course it is possible - been there, done that, ages ago, in the medical world.
What is a breakthrough, and noteworthy, is a JW patient jumping through the ethical hurdles and actually acquiring a donor heart.