Chest pains? Heart attack? By-pass surgery? Let's look at past history of someone who came into lots of money (as Clinton has mentioned on many occasions). Hank Gaithers got a BIG contract from the Celtics and promptly blew out his heart ODing on cocaine. I'm not saying this is the case, but brother Roger once said "he has a nose like a vacuum." Is it possible that never releasing his complete medical records was done because of a pre-disposition to cardiac occurrences? Spending time in Europe in recent months would still allow Clinton to say "I did not break the laws of THIS country." Would his status as ex-POTUS and Secret Service protection immunize him from the same scrutiny that ordinary citizens would receive if we re-entered the US? Do "Diplomatic Pouches" equal ex-pres luggage?
(Of course, there's the "Bad things/good people" angle, too)
Cocaine & Clinton was my first thought as well.
And, um, some STDs can cause heart damage too, can't they?