The procedure is intrusive by nature, and that includes on your normal routine, on your schedule for the day, for its financial obligation, because it can mean a finding of yet more work that might be needed, and it is in an unnatural position, reclined with someone hovering over you. But, there's also the potential discomfort that comes from the scaling. We all have the odd sensitive tooth, maybe a bit of gingivitis or the precursor to that condition, and the dental hygiene procedure usually means a bit of unpleasant sensation at least.

By the time you are reclined and awaiting the first placement of the ultrasound or the scraper, you are wound up. Then, you begin to hold your breath a bit, clench your fists, tense your toes, and generally cause a rise in blood pressure. Your inner visceral tension rises, much like it does when you bend over to retrieve something off the floor or to tie your shoes. This can often bring on AF or PACs.