Well accodring to my Medic class i just got done with cardio thumps arent taught any more. Now i have never had an opportunity to try it, do they really work? I was talking to a nurse in the cath lab the other day on my medic rotations that said after she gave lidocane to a pt that had an allergy to it the pt went into asystole. She said she got her back with a quick thump. Thinking about it i have no problems at all trying it because it takes half a second to do. Its more out of curiosity. How hard do you gott wack em if it does work?