The celts are being so mysterious on this, I wonder if Jeff failed some drug related testing and they are waiting on follow up testing to confirm a positive hit.
Jeff seems like an upstanding guy but you never know.
He's coming out to practices and shooting around and stuff. I can't imagine he would be cleared to do even that if it was heart related.
Let's hope it was none of the above and Jeff was just stressed out during the first go round of tests.