AED Myths in Singapore: What People Get Wrong

The most dangerous thing about a cardiac arrest in Singapore is often not the collapse. It is the bystander who hesitates because they believe something about AEDs that is not true.

"I'm not a doctor." "What if I get sued?" "What if I shock them by accident?" Each of these is a myth, and each one costs the seconds that decide whether early defibrillation still works.

This guide takes the AED myths that keep coming up in Singapore and replaces them with what actually happens, so that the next time you are the person standing next to the cabinet, you act instead of freezing.

What an AED actually does

An AED (automated external defibrillator) is a portable device that analyses the heart's electrical rhythm and, only when appropriate, delivers a shock to correct it. It is built for untrained members of the public, with spoken step-by-step prompts.

It does not diagnose. It does not require you to read a heart trace. You attach the pads, and the device decides whether a shock is needed. That single design fact dismantles most of the myths below.

Myth 1: "Only doctors or paramedics can use an AED"

False. Public-access AEDs are designed specifically for lay responders. The whole point of putting them in malls, MRT stations, and HDB lift lobbies is that ordinary people use them before professionals arrive.

You turn it on, follow the voice prompts, place the pads as shown on the diagram, and stand clear when told. Singapore's entire community response model depends on this. SCDF's myResponder app alerts nearby Community First Responders, many of them members of the public, precisely so a non-professional can start help early.

Training builds confidence, and it is worth doing. See community emergency preparedness courses. But a lack of certification does not stop you from using a device engineered to talk you through it.

Myth 2: "You'll get sued for using an AED in Singapore"

This fear is not supported by how the law actually works here. Singapore does not have a dedicated Good Samaritan statute, and that fact gets misread as "you are exposed." The opposite is closer to the truth.

Singapore's position, stated in Parliament and explained by legal commentators for the Singapore Heart Foundation, is that ordinary laws already protect people who help in good faith. Civil liability generally does not attach to someone who acts out of necessity with the care reasonably expected of a person of their skill and experience. Criminal liability generally requires malicious intent, not a good-faith rescue attempt.

Lawyers also point to causation. For a claim to succeed, someone would have to prove that the person would have been better off had you not acted. For a victim in cardiac arrest, whose heart has already stopped, that is extremely hard to argue.

There is no known Singapore case of a bystander being successfully sued for performing CPR or using an AED to try to save a life. The realistic risk is not a lawsuit. It is doing nothing.

Myth 3: "An AED can restart any stopped heart"

False, and this is the myth that films get most wrong. An AED does not jump-start a flatline.

A defibrillator treats specific shockable rhythms, mainly ventricular fibrillation (VF) and pulseless ventricular tachycardia (pulseless VT). In these rhythms the heart's electrical activity is chaotic, and a shock can interrupt the chaos so a normal rhythm has a chance to return.

When the heart shows asystole, a true flatline, there is no electrical activity to reset. A shock cannot restart it. That is why the AED will say "no shock advised" for some patients even though they are clearly unresponsive.

This is exactly why CPR matters so much. Chest compressions keep some oxygenated blood moving and can help maintain a rhythm that remains treatable. The AED is not a magic restart button. It is one link in a chain. Read how much bystander CPR and AEDs really help for the honest version.

Myth 4: "I might shock a healthy person by accident"

False. You cannot use a public-access AED to shock someone who does not need it.

The device analyses the rhythm before allowing any shock. If it does not detect a shockable rhythm, it will not enable the shock, even if you press the button. It will instead tell you to continue CPR.

This is a deliberate safety design. The decision to shock is made by the machine's analysis, not by your guess about what is happening. Your job is to attach the pads correctly and stand clear during analysis.

Myth 5: "Doing nothing is safer than trying"

This is the most harmful myth of all. In cardiac arrest, inaction is the choice with the worst outcome.

Without CPR and, where appropriate, defibrillation, the chance of survival falls with every passing minute. A bystander who starts compressions and applies an AED gives the person a fighting chance that waiting simply does not.

You are not expected to be perfect. Dispatchers on 995 will coach you through CPR even if you have never done it. The bar is not flawless technique. The bar is starting.

Myth 6: "There's an AED nearby, so we're fine"

Not necessarily. A device existing in a building is not the same as a device you can reach in time.

Many listed AEDs sit behind doors that lock after office hours, in separate towers, or on floors that are slow to reach. "Public access" describes intended emergency use, not guaranteed 24-hour availability. See why AED access depends on opening hours.

The fix is to check in advance rather than assume. Look up the devices near your home, workplace, and regular MRT stop on AEDLocator, confirm the floor and hours, and know a backup. Our guide on how to check if an AED is nearby walks through it.

Myth 7: "You can't use an AED on someone who is wet, pregnant, or has a pacemaker"

Mostly false, with small practical adjustments.

• Wet skin: do not lay the person in a puddle, and quickly wipe a very wet chest before applying pads. You do not abandon defibrillation because someone is damp.
• Pregnancy: an AED can be used. It will only advise a shock if the rhythm calls for one, and treating the mother is how you protect both mother and baby.
• Pacemaker or implanted device: you can still use an AED. Avoid placing a pad directly over the obvious lump of an implanted device, and place it a few centimetres to the side instead.

The general rule holds: follow the AED's prompts, place pads on a bare, dry chest as shown, and let the device analyse.

Myth 8: "The AED replaces CPR"

False. They do different jobs, and they work best together.

CPR keeps blood moving. The AED treats a shockable rhythm. In a real arrest the sequence is call 995, start CPR, get the AED, and follow its prompts, resuming CPR between analyses. If you are alone, keep doing what the dispatcher says rather than leaving the person to hunt for a device.

Learn the full sequence in how to use an AED and what to do before an ambulance arrives.

What to do instead of believing the myths

If someone collapses and is unresponsive and not breathing normally:

1. Call 995 and put the phone on speaker.
2. Start CPR, and let the dispatcher coach you.
3. Send someone for the nearest AED you already know about.
4. Turn it on, attach the pads, and follow its prompts.
5. Keep going until SCDF takes over or the person shows clear signs of life.

The device is designed for you. The law is not waiting to punish you. And the only wrong move in a cardiac arrest is to stand back and hope someone more qualified appears.

Prepare before you need it: find the AEDs near the places you spend time on AEDLocator, install myResponder, and consider a hands-on CPR and AED course.

FAQ: AED myths and facts in Singapore

Do I need a licence or certification to use a public AED in Singapore?

No. Public-access AEDs are made for untrained bystanders and give spoken instructions. Training helps your confidence, but you do not need certification to use one in an emergency.

Can I be sued in Singapore for using an AED to help someone?

There is no dedicated Good Samaritan law, but existing laws generally protect people who act in good faith with reasonable care, and there is no known Singapore case of a rescuer being successfully sued for trying to save a life with CPR or an AED.

Will an AED restart a heart that has completely stopped?

No. An AED treats shockable rhythms such as ventricular fibrillation and pulseless ventricular tachycardia. It cannot restart a true flatline (asystole), which is why CPR and calling 995 remain essential.

Can I accidentally shock someone who does not need it?

No. The AED analyses the heart rhythm first and will not deliver a shock unless it detects a shockable rhythm, even if the button is pressed.

Is it safe to use an AED on a pregnant woman or someone with a pacemaker?

Yes. Use the AED and follow its prompts. For an implanted device, place the pad slightly to the side rather than directly over the lump. Treating the person is what protects them.