What time frame should be used to administer intravenous epinephrine?

What time frame should be used to administer intravenous epinephrine? Rapid push, as quickly as possible.
When are chest compressions indicated?
When the heart rate remains less than 60 beats per minute after 30 seconds of positive-pressure ventilation that moves the chest, preferably through an alternative airway.

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.