I was taking part in a medical study lately my bp at its highest was 125/56 and at its lowest 108/43. I passed out giving a blood sample pre-medication (and had to be taken off the study), it was my third blood draw in the same spot, i had fasted twelve hours and I looked while she was doing it. Do you think this is related to lowish BP, or am i a wimp? Which figure is more important in determining BP the first or second value? I read on another site that 90/60 is too low! i have normally no sytoms of dizziness etc except sometimes when i stand up too quickly.