What is cardiac pressoreflex? How does the use this to counteract abnormal increase of heartbeat?

Its a phenomenon where the heart has less energy to pump blood like in case of stress thus the pressure levels increase. In doing so the heart beats faster to deliver the blood in cells and pressure levels increase more and more. This is not like what you experience in while exercising or doing other things.This is a refles action which happens mainly to cater for the cell metabolism rate during high stress times.