What are the indications for using an AED (Automated External Defibrillator)?

The use of an Automated External Defibrillator (AED) is specifically indicated in cases of cardiac arrest where the patient exhibits no pulse or effective breathing. This scenario is critical because AEDs are designed to analyze the heart's rhythm and deliver an electric shock if a shockable rhythm, such as ventricular fibrillation or pulseless ventricular tachycardia, is detected.

When a person is in cardiac arrest, the heart is unable to pump blood effectively, leading to a lack of oxygenated blood flow to vital organs. Immediate defibrillation can significantly increase the chances of survival and improved neurological outcomes. Therefore, recognizing the absence of a pulse or effective breathing as an indication for AED use is essential in emergency situations to facilitate rapid intervention.

In contrast, conditions such as severe chest pain, known heart conditions, or respiratory distress do not necessarily indicate immediate AED use, as the patient might still have a functioning heart and adequate circulation. AEDs are specifically utilized when a life-threatening arrhythmia is suspected due to the absence of a pulse or effective breathing, hence their use is focused on cardiac arrest scenarios.