AED Help

AED Q&A

How does an AED work?

An AED analyzes the patient’s heart rhythm through two electrode pads placed on the chest. If a life-threatening, shockable rhythm is detected, the AED automatically determines the need for a shock. It then delivers an electric shock to help restore a normal heart rhythm. Throughout the process, the AED provides clear voice prompts to guide the user step-by-step, making it usable even for non-medical responders.

What heart rhythms can an AED detect?

Two types: “shockable rhythms” and “non-shockable rhythms.”

Will an AED shock someone who doesn’t have SCA?

No, AEDs are designed to analyze the heart rhythm and only deliver a shock if a shockable rhythm, such as ventricular fibrillation or pulseless ventricular tachycardia, is detected. If the person does not have sudden cardiac arrest (SCA) or if their heart rhythm is non-shockable, the AED will not deliver a shock, ensuring the device only intervenes when necessary.

What happens if I make a mistake while using an AED?

Mistakes are unlikely when using an AED. The device provides clear, easy-to-follow instructions, and it will only deliver a shock if necessary. Additionally, it ensures that no shock is delivered if the victim’s heart rhythm is not shockable, preventing unnecessary risks.

Can the AED itself make a mistake?

It is very unlikely. AEDs are designed with advanced technology to accurately analyze the heart rhythm. They typically interpret the victim’s heart rhythm faster and more accurately than many trained professionals. If the AED determines that no shock is needed, it will not allow a shock to be delivered. This ensures that the device only acts when it is absolutely necessary.

Do I need special training to use an AED?

While no formal medical training is required to use an AED, it is recommended that you take a basic first aid and CPR course. That way, you can be more confident in using the device in an emergency, although the AED will still guide you through the process.

Are AEDs waterproof and suitable for harsh environments?

Yes. VIVEST A1 & A3 AEDs are rated IP55, and P1 & P3 AEDs are rated IP65, making them highly resistant to dust and water.

How quickly can an AED analyse the heart rhythm after pads are attached?

VIVEST AEDs are designed to provide rapid analysis. Once the pads are properly attached to the patient’s chest, the device will analyse the heart rhythm within 7 seconds. This quick response time allows for faster intervention and improves the chances of saving the patient’s life.

What’s the difference between adult and child mode?

The main difference between adult and child mode is the amount of shock energy delivered. In child mode, VIVEST AEDs use a lower shock energy of 50 joules, which is more appropriate for paediatric patients, minimising the risk of harm while ensuring effective defibrillation. For adults, the device delivers a fixed shock energy of 150 joules, suitable for adult patients.

What type of waveform does the VIVEST AED use?

The VIVEST AED uses a truncated biphasic exponential waveform for defibrillation.

Is the VIVEST AED fully automatic or semi-automatic?

Both the VIVEST A1/A3 and P1/P3 AEDs are semi-automatic devices. They analyse the patient’s heart rhythm and, if a shockable rhythm is detected, the device will prompt the user to deliver the shock by pressing the shock button. This ensures the rescuer is actively involved while being guided through the process to provide effective defibrillation.

How do I know if the AED is ready for emergency use?

VIVEST AEDs perform regular self-test to ensure they are operational. In standby mode:

If the device passes the self-test: The status indicator will flash green, indicating that the AED is ready for use.
If the device fails the self-test: The status indicator will flash red, and the device will emit a beeping sound. This means the device needs repair, and you should contact the manufacturer.

Always check the status indicator to confirm that the device is ready before relying on it in an emergency.

I used my AED in an emergency. What do I need to do to prepare it for the next time? Can I use my device more than once?

After using your AED, it is essential to check and replace any consumables, such as electrodes and batteries, if needed. The electrodes are single-use and should be replaced after each use. Make sure to inspect the device for any alerts or malfunctions. The battery may also need replacement, depending on its status. AEDs are designed to be used multiple times, so after the proper checks and replacements, your device will be ready for the next emergency.

Where can I find the device serial number?

For A1/A3 AEDs: The serial number is located on the back of the device, printed on a label or barcode sticker.
For P1/P3 AEDs: The serial number can be found on the side of the device.

If you’re unable to find it, refer to the user manual or contact customer support for help.

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