Lately I Get A Irregular Heart Beat Just As I

Lately I get a irregular heart beat just as I am about to eat lunch... No food intake since I finished breakfast 5 hours earlier. I am 68... Good health. Have had episodes like this before but not everyday at the same time. In the past have had episodes of tachycardia that I can stop... That's been going on for over 40 years.
Have worn monitors in the past but showed really nothing except what I have described