Yes, an AED can and should be used on a child in cardiac arrest. Pediatric pads or an attenuator are preferred for children between 1 and 8 years old or under 25 kg (55 lbs) when they’re available, and a manual defibrillator is the preferred tool for infants under one year when trained clinicians are on hand. If none of that is available, turn on the AED, follow its prompts, and start or resume CPR immediately: early defibrillation saves lives.

TL;DR:

• Pediatric pads are recommended for children aged 1 to 8 years or under 25 kg (55 lbs), but adult pads can be used if pediatric options are unavailable.
• An AED should only be applied to a child who is unresponsive, not breathing normally, and shows no signs of circulation, with immediate CPR and emergency help.
• Infant defibrillation is ideally performed with a manual device by trained clinicians, but a standard AED is better than no treatment if necessary equipment isn’t available.
• Proper pad placement, including anterior-posterior positioning for small chests, and regular maintenance of pads and batteries are essential for readiness.
• Regular, hands-on training with pediatric scenarios and drills improves responsiveness and confidence in handling child cardiac emergencies.

Table of Contents

• Who counts as a child for AED purposes
• When to use an AED on a child, and when not to
• Choosing pediatric pads and attenuators for your AED
• Step-by-step: using an AED on a child
• Pad placement on small chests and the anterior-posterior option
• Infant-specific guidance and cautions
• Building a training and readiness program
• Why tailored preparedness matters for every child
• How our CPR and AED training supports your program
• Sources
• FAQ

Who counts as a child for AED purposes

Age and weight guidelines exist to help you choose the right pads fast, not to slow you down. According to the American Heart Association, children age 1 through 8, or those weighing less than 25 kg (55 lbs), should get pediatric attenuated pads when they’re on hand. Kids over 8 can be treated with standard adult pads and settings.

When you’re not sure how old a child is or how much they weigh, use a visual estimate rather than pausing to calculate anything precisely.

• If the child looks elementary-school age or younger, reach for pediatric pads first.
• If pediatric pads aren’t available, use adult pads rather than withholding treatment.
• The AED itself will only recommend a shock if it detects a shockable rhythm, so attaching pads and letting the device analyze is always the safe next step.

When to use an AED on a child, and when not to

Recognizing cardiac arrest quickly is what makes every later step matter. A child in cardiac arrest is unresponsive, not breathing normally (or only gasping), and shows no signs of circulation such as movement or coughing. That combination means it’s time to call 9-1-1, start CPR, and get an AED attached as soon as one is available.

1. Confirm the child does not respond to voice or touch and is not breathing normally.
2. Have someone call for emergency help while you begin chest compressions.
3. Send another person to retrieve the AED rather than delaying CPR to fetch it yourself.
4. Never apply an AED to a child who is conscious, responsive, or breathing normally.

The device will analyze the heart’s rhythm and only advise a shock when one is actually indicated, so attaching the pads carries no risk to a child whose heart doesn’t need it.

Choosing pediatric pads and attenuators for your AED

Schools, childcare centers, and families managing a child’s medical plan should know exactly which pediatric accessories their AED needs before an emergency happens. Pediatric pads are smaller and placed differently than adult pads, and an attenuator is a cable or key that reduces the energy an adult AED delivers down to a pediatric-appropriate dose, sometimes to roughly 50 joules according to device regulatory filings.

• Keep pediatric pads and any attenuator key stored with the AED, clearly labeled, and never in a separate cabinet.
• Check expiration dates on pads and battery status on a regular schedule, since expired pads may not adhere or conduct properly.
• Confirm any pediatric accessory is FDA-approved and compatible with your specific AED model before purchase.

The AHA does not endorse particular brands, so coordinate with your local EMS or a training provider to confirm the right accessory for your device.

Pro Tip: Store pediatric pads in the same case as your AED, never in a separate supply closet, so no one has to search for them under pressure.

Step-by-step: using an AED on a child

Once you’ve confirmed cardiac arrest, the sequence matters as much as the equipment.

1. Check responsiveness and breathing, shout for help, and call 9-1-1 or direct someone else to.
2. Begin CPR immediately if you’re trained, while a second responder retrieves the AED and any pediatric pads.
3. Turn on the AED, remove the child’s clothing, dry the chest, and attach the pads according to the diagram on the pads themselves, connecting any pediatric cable if the device requires one.
4. Step back and make sure no one is touching the child while the AED analyzes the rhythm, deliver a shock if the device advises one, then resume CPR immediately afterward.
5. Continue cycles of CPR and AED analysis exactly as the device directs until emergency medical services arrive or the child begins to show signs of life.

This sequence mirrors the lay-rescuer steps the AHA outlines, and following it in order matters more than moving fast through any single step.

Pad placement on small chests and the anterior-posterior option

Standard adult pad placement puts one pad on the upper right chest and the other on the left side, below the armpit. On a smaller child, scale that placement to their anatomy rather than forcing adult spacing onto a small frame.

• If the two pads would touch or overlap when placed on the front of the chest, move to anterior-posterior placement: one pad on the center of the chest and the other on the child’s back, between the shoulder blades.
• Dry the chest thoroughly before applying either pad, since moisture interferes with adhesion and conduction.
• Never place a pad directly over an implanted medical device or a medication patch; shift it at least an inch to the side instead.
• Practicing pad placement with training pads during drills builds the muscle memory that keeps hesitation out of a real event.

Infant-specific guidance and cautions

For infants under one year old, a manual defibrillator operated by trained clinicians is the preferred option when one is available, according to pediatric guideline summaries. The evidence base for AED use in infants is thinner than it is for older children, which is why guidance leans conservative rather than definitive.

Historical pediatric defibrillation dosing recommended roughly 2 joules per kilogram, though some evidence suggests higher doses may work as well or better, and AEDs with pediatric attenuation have documented successful use in children even where direct infant data remains limited.

If no manual defibrillator or pediatric-attenuated AED is on hand, using a standard AED on an infant is still the right call rather than withholding treatment while you wait for better equipment. Coordinate with emergency services as soon as possible so advanced pediatric care can take over.

Building a training and readiness program

Confidence with pediatric pads doesn’t come from reading a guide once. It comes from practicing the motions until they’re automatic, which is exactly what structured training programs are built to do.

• Enroll staff and caregivers in AHA Heartsaver or Heartsaver Pediatric courses, or an equivalent hands-on program.
• Designate a visible AED location, register the device with local EMS, and post signage that points to it clearly.
• Schedule recurring drills that include pediatric pad placement, not just adult scenarios.
• Check pads, batteries, and attenuator accessories on a fixed maintenance calendar so nothing expires unnoticed.

Programs that pair training with AED access have been shown to improve survival compared with CPR training alone, which is the strongest argument for treating drills as routine rather than optional. Schools working through state requirements can also review our state-by-state CPR requirements guide for teachers and our breakdown of documents inspectors expect from childcare CPR programs.

Pro Tip: Run at least one pediatric-specific AED drill per term, separate from your adult scenario, so pad placement on a small chest never feels unfamiliar.

Why tailored preparedness matters for every child

Every classroom and every home includes children who respond differently under stress, and that includes children with autism or other developmental differences who may need extra time, different cues, or a calmer approach during an emergency drill. Building Block Resolutions has spent more than 20 years working alongside families and school staff on individualized behavioral plans, and that same principle, that preparedness has to fit the child in front of you, applies just as much to emergency readiness as it does to daily therapy goals. Parent coaching and staff training built around a child’s specific needs make drills more effective, not just more comfortable.

— Jennifer

How our CPR and AED training supports your program

Building an AED-ready classroom or household takes more than good intentions. It takes practiced steps, and that’s where organized training earns its place.

• On-site CPR and AED workshops for school staff, childcare teams, and families.
• Behaviorally based staff training that pairs emergency readiness with an individualized approach tailored to children with autism.
• Parent coaching sessions that support preparedness in the home environment.
• Crisis management and crisis prevention planning for organizations developing readiness plans.

Visit our ABA autism therapy and crisis management services page to ask about scheduling a CPR and AED workshop for your school or care team. Families weighing broader emergency planning may also find our childhood choking first-aid guide useful, and organizations coordinating swim season safety can review this external swim safety guide for parents for complementary water-safety practices. This training offering is optional and separate from the guidance above.

Sources

• AED fact sheet — American Heart Association (child guidance)
• Philips HeartStart FRx PMA/510(k) documentation (pediatric attenuator data)

This article is general information, not a substitute for advice from a qualified doctor. Consult a qualified healthcare professional about your own circumstances before acting on anything here.

FAQ

Can I use an AED on a 10-year-old child?

Yes. Children over 8 years old are treated with standard adult AED pads and settings, according to AHA guidance. No pediatric attenuator is needed at that age.

When is it never okay to use pediatric AED pads?

Pediatric pads should not be used on children over 8 years old or those who weigh more than 25 kg (55 lbs), since the reduced energy they deliver may not be enough for a larger body. In that case, standard adult pads are the right choice.

Can defibrillation be used on children under 8 years old?

Yes. Children between 1 and 8 years old, or under 25 kg (55 lbs), should receive pediatric attenuated pads when they’re available, and a standard AED can still be used if pediatric pads aren’t on hand rather than delaying treatment.

What age is a child for CPR AED?

For AED purposes, a child is generally defined as 1 to 8 years old or under 25 kg (55 lbs), with infants under 1 year handled under separate guidance that prefers a manual defibrillator when trained clinicians are present. Children over 8 are treated using adult AED protocols.

Recommended

• Caregivers: CPR vs First Aid and Your One Minute Action Plan
• 5 and 5 Choking First Aid Every U.S. Parent Must Know