MediQ: I've been there done that.
If you fail your ECG medical they send you to see a cardiologist who does:
Blood tests
Ultrasound
Holter monitor
Stress test
Then and only then do you know what state you are in.
They cleared me with benign ectopics and that was 6yrs ago. EVERY time I go for my 6 monthly ECG I suffer massive white coat syndrome and my heart goes beserk.
The AME is aware of this but what he is looking for, is NOT what has been recorded for posperity but what has : CHANGED on the readout. Then and only then will they put you back thru the mill to assess your physiological status.
If you fail the cardiologists tests on a second time round - your licence is revoked.
Then you've got to get a proper job.
The CAA are very supportive and don't want to take your licence away...believe me.
Can't answer the second Q. sorry.