AED Guide
A practical guide to understanding Automated External Defibrillators — what they are, how they work, and how to use one in an emergency.
What is an AED?
An Automated External Defibrillator (AED) is a portable electronic device that analyzes a person's heart rhythm and, when appropriate, can deliver an electrical shock (defibrillation) to help the heart re-establish an effective rhythm.
Modern AEDs are designed to be used by people without medical training. They provide clear voice instructions and visual guides throughout the process. The device makes the decision of whether to deliver a shock — the user simply follows the prompts.
How to Use an AED — Step by Step
Turn On the AED
Open the AED case or press the power button. Most AEDs will immediately begin providing voice and visual instructions.
Apply the Electrode Pads
Attach the electrode pads to the patient's bare chest as indicated by the diagrams on the pads. One pad goes below the right collarbone, the other on the lower left side of the chest.
Analyze the Heart Rhythm
The AED will analyze the patient's heart rhythm. Ensure no one is touching the patient during analysis. The device will determine if a shock is needed.
Deliver the Shock (if advised)
If the AED advises a shock, ensure everyone is clear of the patient. Press the shock button (or wait, if fully automatic). Resume CPR immediately after the shock.
Continue CPR
Continue CPR as directed by the AED until emergency services arrive or the patient recovers. The AED will guide you with prompts.
Common Myths About AEDs
❌ Only medical professionals can use an AED
✅ AEDs are designed for use by laypersons. They provide step-by-step instructions and will not deliver a shock unless it is medically appropriate.
❌ AEDs are only for hospitals
✅ AEDs are designed for public spaces — offices, gyms, schools, airports, and community centers. The closer an AED is to a patient, the better.
❌ You can accidentally harm someone with an AED
✅ AEDs analyze the heart rhythm automatically and only advise a shock when it is safe and appropriate to do so.