So basically CAA trusts the ECG macines more than a non-cardiologist AME?
If you were writing headlines for a tabloid you could put it like that.
The fact of the matter is that the CAA has looked into ECGs and obviously come to the conclusion that the predictive value of an ECG reported by the machines (only certain brands and models will do) is such that they are happy that when these codes appear on the ECG report that the chances of the patient having a cardiac problem is low enough for them to nail their colours to the mast.
Of course if the machine suggested that the ECG was normal and there were worrying signs on the trace it would be quite OK to comment on that; after all one has one's professional responsibility.