I have been dealing with these for 12 years now however recently now that I am losing my mind over them I notice they like to come on close together. Usually 1 followed by 1-5 normal beats, then another one, repeat one to two more times. Then they will be gone for hours, days or if I am lucky weeks.
Over the longer term they also come on strong for days at a time, then subside for a few days rinse and repeat.
Why do they come in patterns and is this troubling?