Thanks WhisperJet.
My anomaly is WPW syndrome. I passed the treadmill stress test for WPW with flying colors but (un)fortunately they found a potential blockage instead. I say (un)fortunately because obviously I'd like to have had a perfect stress test, but if there is a problem my life is more important that my job and it's best I find out sooner than later.
I spoke with the cardiologist on the phone today and he clearly spelled out the various paths this could go down, so I feel somewhat better now than I did last night. Right now we're at inconclusive and I've got to do a nuclear stress test for my next step. Hopefully that test is negative and I'll be good to go, if not then I believe he said the next step would be an angiogram.