An AED drill is a practice run of your organization’s response to a sudden cardiac arrest. A team simulates discovering an unresponsive person and works through every step, from calling 911 to retrieving the AED to delivering a shock, with the goal of completing the entire sequence in under three minutes. The drill reveals whether your plan actually works under pressure or just looks good on paper.
Why AED Drills Matter
In a real cardiac arrest, every minute without defibrillation reduces the chance of survival by roughly 10%. The single most important factor is how quickly your team can act. An AED drill tests that readiness by putting your Cardiac Emergency Response Plan (sometimes called an Emergency Action Plan) into motion in real time, so you can spot problems before someone’s life depends on it.
Beyond speed, drills help identify concrete gaps: whether you need more trained personnel, whether your AED is in the right location, whether your communication system works, and whether team members actually remember what to do. Organizations and schools should run at least one drill per year to maintain optimal performance.
How an AED Drill Works
A typical drill starts with a simulated “discovery.” Someone finds a manikin (or a volunteer playing the role of a collapsed person) in a realistic location, like a hallway, gym, or office. From that moment, the clock starts. The team works through the full cardiac emergency response: recognizing the arrest, activating the emergency plan, performing CPR, retrieving the AED, and delivering a simulated shock.
The drill uses training equipment rather than live AED units. AED trainers are devices designed to look and feel like the real thing, complete with voice prompts and training pads, but they don’t deliver an actual electrical shock. Paired with a CPR manikin, they create a realistic experience that builds muscle memory and reduces hesitation. Training on a device that closely mimics your specific AED model is ideal, since the buttons, pad placement, and prompts vary between brands.
Key Roles During the Drill
A cardiac emergency response requires multiple people acting simultaneously. During the drill, participants take on distinct roles:
- First responder: The person who discovers the victim, checks for responsiveness, and begins chest compressions immediately.
- 911 caller: Calls emergency services right away, provides the exact address and cross streets, stays on the line, and gives the recommended route for ambulances to enter the building. If the caller has a mobile phone, they bring it to the patient’s side.
- AED retriever: The closest team member grabs the AED from its cabinet (leaving the cabinet door open, which typically triggers an alarm signaling the device has been taken) and brings it to the scene.
- EMS escort: Someone goes to the building entrance to flag down paramedics and guide them directly to the patient’s exact location.
Administrative staff also play a role, confirming that 911 was actually called and stepping in if it wasn’t. The drill should test whether all of these handoffs happen smoothly and without confusion about who does what.
The Three-Minute Target
The American Heart Association endorses a goal of three minutes (plus or minus one minute) from collapse to the first shock for in-facility cardiac arrests. That’s the benchmark most organizations use when evaluating a drill. AEDs should be placed throughout a building so that the walk to retrieve one takes no more than 90 seconds in any direction.
For EMS-dependent response (waiting for paramedics), the target is a shock within five minutes of the 911 call. But that timeline can’t be reliably achieved through conventional ambulance services alone. It requires trained people on-site who can start CPR and operate an AED before paramedics arrive. That’s exactly what the drill prepares your team to do.
What Gets Evaluated After the Drill
The drill isn’t over when the simulated shock is delivered. A debriefing session afterward is where the real value comes in. The team reviews what happened against a checklist of performance criteria: Was the drill completed in under three minutes? Did the right people take the right actions? Was the AED easy to locate and retrieve? Did the communication chain work without gaps?
This evaluation often surfaces the need for specific changes. Maybe the AED needs to be relocated to a more central spot. Maybe more staff need CPR certification. Maybe the emergency action plan itself needs clearer instructions. Organizations should save their drill checklists and any post-event reviews to reference when updating their cardiac emergency response plan each year.
Common Problems Drills Reveal
Several issues come up repeatedly in AED drills, and catching them in practice is the entire point. One of the most common is poor AED placement. The device might be tucked in a cabinet or a hard-to-reach area, adding precious seconds to retrieval time. Drills make this immediately obvious when the retriever can’t get back fast enough.
Equipment readiness is another frequent problem. Batteries die and adhesive pads expire. A drill is a natural checkpoint to verify that the AED is actually functional, not just mounted on the wall. Some organizations discover during drills that no one has checked the device’s maintenance indicators in months.
On the human side, responders sometimes forget to clear the patient’s chest before applying pads. Clothing needs to be removed, sweat wiped away, and excessive chest hair addressed, because any of these can prevent the pads from making good contact and interfere with the AED’s ability to analyze the heart rhythm. People also sometimes continue chest compressions while the AED is analyzing, which can produce an inaccurate reading. These are exactly the kinds of mistakes that feel obvious in a classroom but get missed under stress, which is why physically running through the scenario matters more than simply reviewing a written plan.
How to Set Up a Drill
Planning a drill doesn’t require elaborate preparation, but a few details make the difference between a useful exercise and a chaotic one. Choose a realistic location within your building, not a training room where everyone is already gathered. The point is to test response from normal working conditions. Designate one person as the observer and timekeeper who won’t participate but will track everything that happens and when.
Decide in advance whether the drill will be announced or unannounced. Announced drills work well for a team’s first time, letting people focus on learning the steps without the added stress of surprise. Unannounced drills are more valuable for experienced teams because they test genuine readiness. Either way, make sure the equipment is ready: a CPR manikin, an AED trainer with training pads, and a stopwatch.
After the drill, gather the full team for a structured debrief. Walk through the timeline, discuss what went well, and be specific about what needs to change. Then document it. Written records of drill performance over time show whether your team is improving and help justify requests for additional AEDs, training sessions, or staffing changes.