When a cardiac arrest was not witnessed in a patient who is not breathing and appears to not have a pulse, what is the time after CPR has started before an automated external defibrillator (AED) should be used?
  1. 2 minutes
  2. 3 minutes
  3. 4 minutes
  4. 5 minutes
Explanation
Answer - C - An AED should be used approximately 4 minutes after CPR has started.
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