It was the first time in his career fixing hearts at Johns Hopkins Medicine that David Kass had been asked to diagnose a condition like this: A heart two sizes too small suddenly grows three sizes in one day. For the residents of Whoville, yes, the transformation was wondrous. But when asked to be the Grinch's cardiologist, Kass considered what medical conditions might have caused such a change. Never before had he been asked to diagnose a storybook character - but then again, how many storybook
