Once the shock is delivered, the device will instruct you to begin two minutes of CPR, starting with compressions (pushing on the chest). Some units may direct you through each step of
performing CPR, while others may simply count down the two minute period. CPR following a shock is important. Even if the shock successfully restored an organized heart rhythm, the
heart muscle may take some time before it starts to respond (beat) to that rhythm. You'll want to leave the AED "On" so that it can continue to analyze the heart's rhythm and,
perhaps, direct you to provide additional shocks.