Her heart is healthy, very healthy with no holes or clogs, which normally would be *good* but was not the outcome we wanted. That means whatever is wrong with her is "unknown" so we're back to square one. More doctor's visits and she'll probably be put on blood thinners.
The entire thing was pretty painless, though. She went in, and although the sedatives had ZERO effect on her (she's as lucid as ever, remembers everything), she didn't feel much more than a sore throat.