I'm medical, but a different observation:
My wife got talked into an EKG, it came back "abnormal" ... second EKG indicated the same, but it was not a double blind (they were aware of the first abnormal). Echocardiogram inconclusive ... A Nuc Med stress test was ordered, but the one at rest using medication rather than treadmill, wife complained of cold room and shivering, test came back as possible myocardial infarct. We have a cardiologist in our group that reads echocardiograms only, but we didn't do my wife's - he indicated possible "diaphragm artifact", but only an angiogram would clear it. Angiogram ordered (6k with 3k deductible) ... all is "NORMAL" ... am guessing between all the other tests, we are about 6k into a "all is well angiogram"
My wife did the EKG on her own ... I've told pilots I know NEVER allow an EKG unless you're at a cardiology office or in the ER with chest pain ...