I wouldn't worry about it, I was at work about 12 years ag ad could feel my heart apparently skipping beats. I asked my secretary to take my pulse and she immediately told me to go to the doctor. I wore a monitor for 24 hours confirming PAC's. Doctor said not to be concerned. My cholesterol is under control with Crestor and Zetia although due to my calcium score of 2014 is probably going to cause me to start using Repatha also this month, They want my LDL down to 20 from 50! I only notice the PAC's now when under stress. Retiring 2 years ago has greatly reduced my PAC's.