When is it acceptable to use an AED without hesitation?

Using an Automated External Defibrillator (AED) without hesitation is appropriate when the patient is not breathing and shows no pulse. In emergencies involving suspected cardiac arrest, time is critical. The AED is designed to analyze the heart's rhythm and deliver a shock if necessary to restore a normal rhythm. When the victim is found to be unresponsive with no signs of circulation or breathing, immediate use of the AED, in conjunction with CPR, can significantly improve the chances of survival.

The other options present scenarios that do not warrant immediate AED usage. If the victim is responding, they are likely not in immediate danger of cardiac arrest and do not require an AED at that moment. Waiting for CPR to exceed 10 minutes without deterioration in the situation is unnecessary because prompt application of an AED is far more beneficial. Gathering a first-aid kit while a serious cardiac emergency is unfolding would only delay treatment and is not a safe practice when immediate action is essential.