Sincere thanks to all who answered my question about cardioversion it's helped a lot. As far as the side effects are concerned, I have to agree with what most of you have said about not putting up with them, however, getting something done about them is another matter.
As far as the warfarin clinic at my local hospital is concerned, warfarin doesn't cause the particular side effect that I have despite it being listed on the sheet that comes in every packet of pills. In their opinion, "the drug manufacturers list everything to cover themselves". Anything else, see your GP. Well, I've seen four different GP's and they all start the conversation with "That's naughty of the warfarin clinic people, they're the experts" the conversation that follows reveals that the GP's haven't got a clue what to do so nothing gets done.
A couple of months ago, I phoned my GP's surgery to get a telephone appointment for my annual meds review and to have another go at resolving the side effect issue. I was refused by the receptionist as not being urgent enough. Yes, that's right, you have to tell the receptionist what's wrong with you in order to get any appointment and that's supported by the GP's.
The senior cardiologist at the hospital doesn't believe that Bisoprolol causes shortness of breath unless you have asthma. Unfortunately, as far as alternatives are concerned, after 18 months of not being able to exercise properly because of the breathlessness, I'm now too heavy for the DOAC type of anticoagulants. Before being diagnosed and put on that stuff, I cycled about 50 miles a week as a minimum.
Anyway, I have a telephone assessment with the people who do the cardioconversion on Monday so I'll see what happens then. In the meantime, I'll think carefully about what you've all said and take it into consideration.
Thanks again for your time and replies.