Crash, my medical had not been active when my cardiac issues arose. However, I had all the testing FAA requires (including echo and stress ECG) to approve any class of medical while on atenolol, which is an authorized medication.
As I understand it, my AME could have issued my medical, but it would not have surprised me if a special issuance was required, as it was when I needed eye drops.
2 Disclaimers:
I am not, and never have been, an AME! Nothing I say here is official!
I'm pretty familiar with FAA regs, but know little to nothing about the Euro/UK regs.