Putting it together: team response, aftercare and capstone

The previous lessons covered each part of the response to cardiac arrest separately. In a real emergency they happen together, in a few chaotic minutes, often with frightened bystanders, noise and uncertainty. This final lesson brings the pieces together: how a team of rescuers works, what happens when paramedics arrive, what happens to a survivor afterward, and a capstone scenario that applies the whole course to a realistic workplace. Remember once more that this is an awareness course: the next step for anyone who wants to be ready is a certified hands-on CPR and AED course.

Working as a team

When several trained people respond, the best results come from clear roles and communication. One person should take the lead: often the first trained person on scene or the most experienced. The leader does not need to do compressions; their job is to see the whole picture, assign roles and keep track of time. Typical roles are:

• Compressor: gives compressions and switches with the next compressor about every 2 minutes, at AED analysis.
• AED operator: attaches the AED, follows its prompts and calls "Stand clear" for analysis and shocks.
• Airway and breaths: if trained and a barrier device is available, gives breaths at 30:2.
• Caller: stays on the line with 9-1-1, relays dispatcher instructions and updates.
• Runner and guide: fetches extra equipment such as the first aid kit and naloxone, sends someone to meet the paramedics at the entrance, holds elevators and clears the route.
• Recorder: notes the time of collapse, the start of CPR, each shock and any medication given, for handover.

Closed-loop communication helps: the leader gives a specific instruction to a named person, that person repeats it back and confirms when it is done. For example: "Sam, switch at the next analysis." "Switching at the next analysis." Short, calm statements keep everyone coordinated and reduce pauses in compressions.

When paramedics arrive

When paramedics arrive, keep doing CPR until they tell you to stop. They will usually take over in a planned way so compressions continue with minimal interruption. Leave the AED pads in place unless they ask otherwise; many paramedic monitors can connect to or replace them. Give a brief, clear handover. A useful structure is: what happened and when ("He collapsed at 10:42, we started CPR at 10:43"), what you did ("Two shocks, at 10:46 and 10:48"), what you know about the person (name, age, any known medical conditions or medications) and anything else important, such as a suspected overdose or a fall. The recorder's notes are invaluable here. Then follow the paramedics' instructions: they may ask you to keep doing compressions, to help carry equipment or to clear space.

Return of spontaneous circulation

Sometimes CPR and defibrillation succeed and the heart starts beating effectively again. This is called return of spontaneous circulation. The person may start to move, cough, open their eyes, breathe normally or make purposeful movements. Stop compressions if this happens, but leave the AED pads on and the AED switched on. If the person is breathing normally but not fully awake, place them in the recovery position and monitor breathing continuously. Cardiac arrest can recur, so be ready to start CPR again immediately if breathing becomes abnormal.

Care after cardiac arrest

For people who survive to reach hospital, the fourth and fifth links of the chain of survival take over: treatment of the cause, such as opening a blocked artery, careful temperature and blood pressure management, and support of the brain and other organs. Survivors often face a long recovery. Many have problems with memory, concentration, fatigue, anxiety or depression in the months afterward, and some receive an implanted defibrillator. The 2025 guidelines emphasize recovery and rehabilitation as part of survival, including physical, cognitive and emotional support for survivors and their families. For workplaces, this means supporting a survivor's return to work through accommodation and a graduated return, as HSE-109 discussed.

When resuscitation does not succeed

Many people in cardiac arrest do not survive despite excellent CPR and early defibrillation, particularly when the arrest was not witnessed, the cause was not a shockable rhythm or the person had serious underlying illness. Rescuers who did their best should know that they gave the person their only chance. Feelings of sadness, guilt, anger or numbness are common. The supportive debrief and follow-up described in Lesson 11 matter just as much when the outcome is death, and family members and co-workers who witnessed the event may need support too.

Capstone scenario

Work through this scenario using everything in the course. It combines recognition, calling, CPR, AED use, a special circumstance and the workplace program.

Lessons from the scenario

The scenario shows several points that make the difference in real events. Recognizing agonal gasping immediately saved minutes. Giving specific tasks to named people meant 9-1-1 was called and the AED fetched while CPR started. The 150-second round trip to the office was near the edge of the 3-minute target; a review might move the AED closer to the shop floor or add a second unit. The untrained co-worker was able to help through dispatcher coaching. And the after-event steps ensured both the AED and the people who used it were ready for the future.

Your next steps

If you have not already done so, take a certified CPR and AED course with the American Heart Association, the American Red Cross, the National Safety Council or another recognized provider, ideally one that includes a manikin with feedback on depth and rate. Find out where the AEDs are in your workplace, your home community and the places you visit often. Check whether your workplace has an AED program and an emergency plan, and offer to help improve them. Encourage family members, including children from about age 12, to learn CPR; the 2025 guidelines support teaching it in schools.

Most cardiac arrests happen at home, so the person you save is most likely to be someone you love. The skills in this course take only a few hours to learn and a few minutes to use, and they can turn a death into a survival story.

Practicing the whole response

The best preparation for a real cardiac arrest is a realistic drill that runs from collapse to handover. Choose a location and time without warning most participants, use a manikin and a trainer AED, and have an observer time each step: recognition, the 9-1-1 call, the start of CPR, the AED arriving and the first simulated shock, and meeting the ambulance. Debrief afterward and fix what slowed the response. Repeating drills on different shifts and in different areas shows whether the plan works everywhere, not just in the main office.

A final word on confidence

People who have used CPR and an AED in a real emergency often say afterward that their training took over and that the AED's voice prompts kept them calm. Others say they doubted themselves and wished they had practiced more. Confidence comes from repetition: a certified course, short refreshers, drills at work and knowing exactly where the nearest AED is. The goal of this course has been to give you the understanding behind those skills, so that when the moment comes, you recognize it, call for help, push hard and fast and use the AED without hesitation.