AED Pad Placement: Complete Guide for All Ages

AED and CPR Dummy for Certification Training.

AED pad placement sounds like a small detail until the pads are in your hands and a person is on the floor. In that moment, the second-guessing arrives fast: which pad goes where, what to do if the patient is a child, whether the pads look too big for the chest in front of you, whether putting them in the wrong spot would somehow make things worse.

AEDs are designed for that exact moment. The pad diagrams printed on the pads themselves do most of the work, and the voice prompts cover the rest. The reason to know the basic placement before the emergency arrives is simple: less time spent staring at a chest, more time spent moving through the response.

Pad placement is what allows the AED to read the rhythm correctly and, if the rhythm calls for it, deliver a shock through the heart along the path the device expects. When the pads land where the diagrams show and the rest of the sequence keeps moving, the response feels tighter at the point where hesitation costs the most ground.

If you want the sequence to feel familiar before any of it is real, the AHA BLS CPR class in Tallahassee gives students hands-on practice with AED use, including pad placement on a manikin, instead of leaving it as a guess-in-the-moment skill.

Upcoming CPR Class Dates and Times

AED Pad Placement for Adults

For an adult, the standard placement is simple. One pad goes on the upper right side of the bare chest, just below the collarbone. The other goes on the lower left side, a little below the armpit.

That layout sends the current through the heart in the direction the AED is built to use. Nobody has to invent a custom placement or recall medical language while a person is on the floor. Follow the diagram printed on the pads themselves and press them firmly onto dry bare skin.

Expose the chest before the pads come out. Clothing gets in the way, and wet skin needs to be dried quickly first. Heavy chest hair sometimes prevents the pad from sticking, in which case a quick razor pass over the pad site fixes it. These are normal adjustments, not reasons to walk away from the rescue.

For adults, keep the placement simple: upper right chest, lower left side. Press the pads down well, let the AED analyze, and follow the prompts.

AED Pad Placement for Children (Ages 1–8)

For children ages 1 to 8, AED pad placement depends on the size of the child and the type of pads available. If the device has child pads or a child mode, use those and follow the device instructions.

In most cases the placement still follows the pad diagrams provided with the AED. If both pads fit on the chest without touching, place them as directed on the front of the chest. If the child’s chest is too small for that and the pads would meet, the setup may shift to front-and-back positioning if the AED instructions call for it.

A smaller chest can make the whole setup look unfamiliar at first. Slow down for a beat, check the diagrams, and make sure the pads do not overlap. The right move is not to force the usual adult layout onto a body that clearly cannot fit it.

Familiarity is what helps most. A person who has practiced the CPR-and-AED sequence on a child manikin in a hands-on class is much more likely to trust the diagrams and keep moving instead of freezing on pad size.

AED Pad Placement for Infants (Under 1 Year)

Infant AED pad placement is the part that makes most people nervous, mostly because the body is so small. The basic rule still applies: follow the AED instructions and use infant or child equipment if it is included with the device.

When the chest is too small for both pads to sit on the front without touching, a front-and-back setup is often the answer. One pad goes on the center of the chest, the other on the back. That avoids overlap and still gives the AED the path it needs to work.

Improvising from memory is not the move when the pad diagrams are right there in front of you. The diagrams and the voice prompts exist for exactly this situation. Place the pads where the device shows, make sure they are not touching, and stay with the response.

Infant emergencies feel more intimidating on paper than they do after a person has worked through the steps once with an instructor present.

What If Pads Touch or Overlap?

If the pads end up touching or overlapping, fix it before the AED analyzes the rhythm or delivers a shock. The pads need enough separation between them for the current to take the path through the heart that the device is designed for.

The situation comes up most often with smaller patients, where the standard front placement does not have room for both pads without contact. The fix is not to wedge the pads in anyway. The fix is to follow whichever alternative the AED instructions show for a smaller body, which is usually a front-and-back setup.

Panicking over perfect placement wastes time at exactly the wrong moment. The job is to get the pads into the non-touching positions the device shows and keep the response moving.

For the full sequence around pad placement, shock prompts, and when to clear the patient, the step-by-step AED guide covers how the pieces fit together once the pads are down.

Special Situations

Medication patches. Pull the patch off and wipe the skin clean before placing the pad. A patch left in place blocks pad contact and can cause a burn under the pad.

Pacemakers and implanted defibrillators. The AED can still be used. If a device is visible or palpable under the skin, place the pad an inch or two to the side of it instead of directly over the lump.

Thick chest hair. Hair is usually not the obstacle people fear. If the pad will not stick, run a razor across the pad site quickly if one is in the kit, then place the pad.

Wet skin or wet ground. Move the patient out of standing water, wipe the chest dry, and keep the AED itself out of the puddle. Do not delay defibrillation longer than the few seconds it takes to make those moves.

Upcoming CPR Class Dates and Times

Pregnancy. AEDs are safe to use on a pregnant patient. Use the adult pads and do not hold back.

Jewelry and piercings. Removal is not required, but do not place a pad directly over metal jewelry or a piercing. Shift the pad an inch off if it would otherwise sit on hardware.

FAQ

For an adult, one pad sits on the upper right chest, just below the collarbone. The other sits on the lower left side, a little below the armpit. That layout sends the current through the heart along the path the AED is built to use. The pads themselves carry diagrams; in the moment, those diagrams are the source of truth, so look at them first instead of trying to remember instructions from memory.

No. The pads need direct contact with bare skin to stick and to let the AED read the rhythm. If the patient is dressed, expose the chest first, even if that means cutting or pulling clothing out of the way. Speed matters, but pads on fabric instead of skin defeat the device.

Dry it quickly before placing the pads. Water keeps the pads from sticking and interferes with how cleanly the device reads the rhythm. A fast wipe with a towel or a piece of clothing usually does it. If the patient is in standing water, move them onto a dry surface first. The goal is good pad contact, not a perfect surface.

No. If the pads end up touching or overlapping, reposition them before the AED analyzes. Overlapping pads can short-circuit the shock and prevent the device from working correctly. The situation comes up most often with children and infants because the body is smaller. When the standard front placement leaves no room without contact, follow the AED instructions for the alternative setup, which is usually front-and-back positioning.

It can be, depending on the child’s size and what the device has on hand. If child pads or a child mode are available, use them and follow the device instructions. The placement may still follow the standard front layout if the pads fit without touching. If the child is small enough that the pads would overlap, the AED instructions may call for a front-and-back setup instead. Check the diagrams and let the device guide the call.

Often yes, because the body is so small. When the front placement would put the pads in contact with each other, the front-and-back setup is the usual answer: one pad on the center of the chest, the other on the center of the back. That avoids overlap and still gives the AED the path it needs. Use infant or child specific pads if they are part of the device, and follow whichever placement the AED instructions show for that body size.

Look at the diagrams printed on the pads themselves. They show exactly where each pad goes with a clear illustration. The AED also gives audio instructions once it is on. The device is built specifically to walk a non-clinician through placement, so turning it on and following the prompts is the answer. Prior familiarity with the sequence reduces freeze time, but the diagrams and voice prompts are there for the moment when memory does not show up.

No medical credential is required. Public AEDs are designed for use by everyday bystanders, and the pad placement diagrams and voice prompts walk a person through the steps. Hands-on training still makes a real difference, not because it teaches anything the device cannot, but because going through the sequence once on a manikin with actual pads means the hands know what they are doing when it counts. The AHA BLS class in Tallahassee covers AED use as part of the full CPR-AED response.

Step back and let the AED analyze the rhythm. When the device says to clear, make sure no one is touching the patient and deliver the shock if the device prompts. Then follow the next instruction, which is typically to resume CPR right away. The AED keeps directing the response in cycles until paramedics arrive. Pad placement is one step in a continuous sequence, not the end of it. For the rest of that sequence to feel familiar before any of it is real, the hands-on AHA BLS class in Tallahassee is where compressions, AED prompts, and pad placement get practiced together with an instructor in the room.

Book Your BLS CPR Class

Choose a class date to reserve your seat

View More Class Dates