How to Choose an AED

Most public-access AEDs are designed to guide a responder through an emergency with clear voice, visual or screen-based instructions. The best model for your organization depends less on brand name alone and more on how and where the AED will be used.

Semi-Automatic vs. Fully Automatic AEDs

A semi-automatic AED analyzes the patient's heart rhythm and, when a shock is advised, instructs the responder to press the shock button. A fully automatic AED analyzes the rhythm and automatically delivers an advised shock after warning the responder to stand clear.

Both designs guide the rescuer through the response process. Availability of fully automatic configurations varies by manufacturer and model.

Adult & Pediatric AED Use

Many AEDs can be used for both adult and pediatric emergencies, but the method varies by model. Some AEDs require separate pediatric electrode pads, while others use a child key, child mode or universal electrodes.

If children are regularly present at your facility, compare the pediatric system before purchasing so the required accessories can be stored with the AED.

CPR Feedback

Some AEDs provide additional CPR guidance beyond basic voice prompts. Depending on the model, features may include a CPR metronome, compression-rate guidance, compression-depth feedback or on-screen coaching.

These features can be especially useful for organizations that want additional real-time guidance during a sudden cardiac arrest response.

Indoor vs. Rugged Environments

Consider where the AED will be stored and used. An AED located in a climate-controlled office may have different requirements than one used around water, athletics, industrial environments or emergency vehicles.

When durability matters, compare the manufacturer's ingress-protection rating and specifications for water, dust, impact and operating conditions.

AED Pads, Batteries & Long-Term Maintenance

The purchase price of an AED is only one part of its long-term cost. Electrode pads have expiration dates, batteries eventually require replacement and some models use separate pediatric accessories.

Before choosing an AED, compare:

• Adult electrode-pad shelf life
• Pediatric pad or child-mode requirements
• Battery life and replacement cost
• Automatic self-test and readiness features
• Availability of replacement supplies
• Manufacturer warranty

Regularly inspect the AED's status indicator and the expiration dates on pads and other consumables according to the manufacturer's instructions.

AED Unit, AED Package or AED Trainer?

These products serve different purposes:

• AED Unit: A functional automated external defibrillator intended for emergency response.
• AED Package: An AED bundled with additional equipment such as a carrying case, cabinet, signage or response supplies. Package contents vary.
• AED Trainer: A non-shocking training device designed for classroom practice. AED trainers do not deliver therapeutic defibrillation energy.

Browse AED packages or AED trainers if you need a complete installation package or classroom training equipment.

Shop AEDs by Brand

• Philips HeartStart AEDs
• ZOLL AEDs
• HeartSine samaritan AEDs
• Defibtech AEDs

Frequently Asked Questions About AEDs

What does AED stand for?

AED stands for Automated External Defibrillator. An AED analyzes a patient's heart rhythm and can deliver a defibrillation shock when the device determines that a shockable rhythm is present.

Can someone without medical training use an AED?

Public-access AEDs are designed to provide step-by-step instructions during an emergency. CPR and AED training is strongly encouraged so potential responders are familiar with the equipment before it is needed.

Can an AED be used on a child?

Many AED models support pediatric use, but the required method varies. Depending on the AED, pediatric treatment may require separate pads, a child key, a child mode or universal electrodes. Follow the manufacturer's instructions for the specific AED.

How often do AED pads and batteries need to be replaced?

Replacement intervals vary by manufacturer and model. Pads should be replaced after use and by the expiration date printed on the package. Battery life also varies, so monitor the AED's readiness indicator and follow the manufacturer's maintenance schedule.

What accessories should be stored with an AED?

Common AED response supplies include spare or appropriate electrode pads, a response kit, scissors, gloves and other items recommended for the specific AED program. Wall cabinets and signage can also help make an AED easier to locate in an emergency.