Pace
Most men ignore their health, not just pilots. Pilots as a population are above average on health.
GS capture
I am not supposed to criticise other doctors, but based on what I know I would advise you not to have any further tests
When you have your aviation ECG your AME will send it to Gatwick where it will be read by a human not a machine. The rate is irrelevant unless your AME is worried.
At your age I strongly suspect the ST depression is nonsense. If you do not have chest pain or shortness of breath please just go have your medical and tell us how you get on