@yellowdoggirl Those are excellent questions!

In your question about what is the "main problem" being limited.... I actually see problems as being interconnected, not limited to a single answer. For example, if you felt dizzy because of a heart malfunction and you fall and break your arm, those 2 problems are related because one significantly contributed to the other. There could have been other factors causing dizziness like a hearing or vision problem or a reaction to a medication or an abnormality in the vascular system. Your doctor should be thinking like this to find all the causes of a symptom, and not just assume there is only one.

You can always ask what else could cause the problem? Sometimes it is more difficult in making a diagnosis, and it can be made by excluding other issues in what they call a differential diagnosis. I am a spine surgery patient, and they had to exclude other problems that can also cause nerve pain elsewhere in the body in order to conclude that the pain was being caused by a problem in the spine itself. This is important because you don't want to do spine surgery that doesn't fix the pain because you didn't find the correct cause of the pain. That is just an example for discussion, and my spine surgery was very successful.

Questions I might add about a pacemaker would be:

How often does a pacemaker need to be replaced due to battery life?

Can it be adjusted and reprogrammed remotely or at an office call?

Will there be a monitoring station that sends data to the doctor daily through wireless communication while I sleep?

How large is the pacemaker and will it be visible to everyone like a lump?