Dear Bob,
PACs AND PVCs are ALWAYS benign, and you don't need but a holter monitor test to tell you that. As a matter of fact, all people have them, unfortunately some have more and some are simply more aware of them.
Very little research has been done on these skipped beats as they are called and that is because they cause NO HARM. Thus in a sense YOU ARE NOT ILL, i.e. YOU have no 'medical condition'. In general patients who are bothered by their skipped beats are advised to reduce their stress level and their awareness of the skipped beats as well-if possible.
Unless you have new symptoms that you did not experience at the time of your prior evaluation, you do not need another work up.
I agree with your doctors about the breathing thing, it is a natural reflex, mediated by the brain, to take or feel the need to take plenty of deep breaths throughout each day; again I think your awareness level is simply in the hyperacute category and it would be best for you
to simply "chill out" in regards to these skipped beats and deep breaths. Good Luck.
Information provided in the heart forum is intended for general medical informational purposes only, actual diagnosis and treatment can only be made by your physician(s).