This is peculiar! I'm having numerous short lived tachycardia events every day. Most of the tachycardias I can't feel at all, and only become aware of with a sudden rush of dizziness. If I check my watch I will be having a fast run up to between 130 and 160 and then back down again. I'm really bemused because my radial pulse feels to be relatively slow and steady when this is happening. Is there any feasible explanation for this?
Some tachycardias feel like the bag of worms, and most of my ectopic runs do too. They both knock me breathless, but the 'silent' tachycardia is always accompanied by pre-syncope.