[Smokin' Joe]

Nope. Did the people doing the post? If she had had a history of heart problems that would have been all over the news. That would have justified a conclusion that cannot be obtained from a physical examination of a static organ.

It wasn't.

The dog didn't bark because there was nothing there.

[4Zoltan]

She may have had a heart condition and not been aware of it. Or maybe she kept any heart issues private.

The fact the dog didn’t bark doesn’t mean there wasn’t a squirrel in tree.