In the UK, IF a Doctor believes revival would be futile, then he will discuss this with the patient to ensure they understand. The next of kin is also involved in the discussion. The decision can be argued against and if the patient decides they WANT revival to be attempted, then it will.
i don't know how anyone can give you any opinion on whether to do CPR or not. I would consult with a cardiologist for advice and read up on the actual success rate of CPR. Not great in the best of conditions.
Septal shock, acute stroke, metastic cancer, severe pneumonia.
other criteria where CPR may be performed but survival is around 4%
Very low blood pressure, kidney failure, AIDS, age > 70.
There is NOTHING to do with bypass surgery which limits CPR decisions and his sternum will be very strong after 15 years. Even hours after surgery, CPR can be performed. Does your husband have any condition that may relate to the above list?