Hi Chrissy,
It's a good thing your murmur was investigated and you should pay attention to the report issued by the Cardio.
My sister and I were both diagnosed with mid-systolic murmurs as kids - they are pretty common - but mine didn't resolve like my sister's did.
Examination showed a bi-cuspid aortic valve (a genetic abnormality giving my valve 2 leaves instead of 3), and these do have a tendency to narrow and harden over time.
I have held an Aussie class 1 medical for 15 years now with no real problems
BUT I will probably need a valve replacement at some stage in the future. I don't know what this means in the UK but in Australia after the operation I will be limited to multi-crew ops only.
Good luck
