After spending the better part of last Friday at the University of Michigan’s Frankel Cardiovascular Center in Ann Arbor, I’m pleased to report that another item has been checked off my to-do list: pre-op visit. It was the usual stuff, including bloodwork, an EKG, chest X-ray and the dreaded “tiny camera down the throat” TEE echocardiogram. Let’s discuss. * * * The shadow knows Funny thing about chest X-ray results, sometimes nipples show up as dark spots and look like something bad when it’s not. It’s just your nipples. And not only in women. Men, too. So, before a chest X-ray, they provide tiny, round plastic things called nipple markers to stick…