Thanks for this question
This sounds like spinal stenosis
have you had an MRI?
This is just worsening of the stenosis.
you need surgery on it right away
that would be the treated of choice
That is the only treatment that is going to help
I would see a physiatrist for this
are you in the UK?
I don't see why you can't have surgery. It is just heart disease.
many people with heart disease have surgery
you can still have surgery