The Incident
In a typical mid-sized administrative building, a lack of immediate access to life-saving equipment turned a medical emergency into an unrecoverable event. Sudden cardiac arrest occurs when the heart's electrical system malfunctions, causing it to suddenly stop pumping blood. Unlike a heart attack, which is a circulation problem caused by a blockage, this is an electrical problem that requires an immediate external shock to restore a viable rhythm. When the heart stops, the brain is starved of oxygen, and the chances of survival drop drastically for every minute without defibrillation.
In this generic reconstruction based on recurring workplace patterns documented by the NIOSH Fatality Assessment and Control Evaluation (FACE) Program, an office worker collapsed during a morning meeting. The crew's decision chain broke down at the most critical moment. Assuming the collapse was a fainting spell or a seizure, coworkers immediately called emergency services but did not initiate chest compressions or retrieve the building's Automated External Defibrillator (AED). They assumed professional responders would arrive in time. However, the building's only AED was stored out of sight in a first-floor security office, completely inaccessible to the second-floor staff who did not even know it was there. By the time emergency medical services arrived and administered a shock, the worker could not be resuscitated and was pronounced dead at the hospital.
Timeline
- Time before — The team was holding a routine mid-morning project planning meeting in a second-floor conference room.
- Earlier in shift — The building's single AED sat inside a closed cabinet near the first-floor security desk, unmarked by clear signage in the stairwells or upper floors.
- Moment before — An employee suddenly gasped, slumped forward in their chair, and fell to the floor unresponsive.
- Point of failure — Coworkers immediately called outside responders but did not initiate hands-only chest compressions or send anyone to retrieve the AED, waiting instead for professionals.
- Response — Emergency medical services arrived minutes after the call, but the delayed defibrillation resulted in an unrecoverable outcome.
What Went Wrong (Root Causes)
Hazard
Sudden cardiac arrest disrupted blood flow to the brain and vital organs, an acute physiological condition requiring immediate electrical defibrillation to restore a viable heart rhythm.
Procedure
The office emergency action plan relied entirely on calling outside responders. There was no established protocol for a parallel internal response, such as starting chest compressions immediately while simultaneously dispatching a runner to retrieve the AED.
Supervision
Building management placed the facility's only AED in a restricted, out-of-sight location on a different floor rather than in a central, high-visibility area accessible to all staff.
Training
Employees lacked basic awareness of the AED's location and were hesitant to initiate emergency response steps due to a lack of recent, hands-on training.
What Would Have Stopped It
Applying the hierarchy of controls to a sudden physiological event requires evaluating our options in order: elimination, substitution, engineering, administrative, and PPE. What is the highest-order control we can use TODAY?
Elimination and substitution of sudden cardiac arrest are not physically possible, as it is an internal medical event. However, we can implement high-level engineering controls by installing highly visible, alarmed AED cabinets in central locations on every floor. This physical design change ensures retrieval time is minimized during an emergency.
At the administrative level, implementing a formalized medical emergency response plan that trains staff to immediately call for help, start chest compressions, and dispatch a runner for the AED bridges the critical time gap before professional arrival. OSHA standard 29 CFR 1910.151 requires that in the absence of an infirmary, clinic, or hospital in near proximity to the workplace, a person or persons shall be adequately trained to render first aid. PPE does not apply to this specific internal physiological hazard.
Discussion Prompts
- If someone collapsed in our workspace right now, who exactly would go get the AED, and where is it?
- What is the first sign we're going off-plan during a medical emergency?
- What barriers prevent us from starting chest compressions immediately while waiting for professional responders?
Action Steps For Your Site
- Walk from your primary workspace to the nearest AED and verify the cabinet is unobstructed. Owner: All Staff Due: Today
- Check the AED status indicator light to confirm the battery is charged and the unit is ready for use. Owner: Floor Warden Due: Today
- Review the emergency action plan to confirm who is designated to meet and guide emergency responders from the building entrance to the exact floor and room. Owner: Office Manager Due: Today
Safety Moment Anatomy
Note: Stop-work authority: Every worker can stop work for an unsafe condition, including blocked emergency equipment, with an explicit guarantee of no retaliation.
Note: Close-the-loop: The Office Manager will report back at tomorrow's huddle on the actions taken regarding our AED checks.
Note: Verification question: Are the controls and emergency roles actually in place RIGHT NOW?
Note: Comprehension check: What will you do differently today regarding our emergency response plan?
Sources
- NIOSH Fatality Assessment and Control Evaluation (FACE) Program — NIOSH, 2026-07-17. cdc.gov
- 29 CFR 1910.151 - Medical services and first aid — OSHA, 2026-07-17. 29 CFR 1910.151