right before i had it increased from 112 mcg, to 125 mcg i had a severe case of svt while i was at work. i almost passed out and
my hr was going so fast u could see my corotid arteries in my neck
pumping with every hr beat. my hr peaked at 210. as soon as i got to the hospital it started to slow down then everything went back to normal. after this happened i went to a cardiologists who performed additional tests and ekgs, and i had a 24 hr hr monitor, but he said everything appeared normal.