i check my blood pressure 3 times a day as directed by my cardiologist and I would say 3 times out of a week that sign comes up.
My cardio doesn't seem to concerned with it...sometimes it comes up if my blood pressure doesn['t match what my heart rate should be.
for example my blood pressure will be 140/90 and my heart rate will be 55 then it showes up an irregularity.
It means a iregular heart beat