TEAM Talks: Understanding First Aid and Defibrillators

Understanding First Aid and Defibrillators

Thursday 12th February, 2026

Illustration by TEAM Safety Services Ltd.

When someone suffers a cardiac arrest, every second counts. Quick action from a bystander — including the use of CPR and a defibrillator — can double or even triple a person’s chances of survival. Yet, many people across the UK still feel unsure about how to respond in an emergency.

At TEAM Safety Services, we believe that first aid confidence can make the difference between life and death. That’s why our accredited Level 3 Award in Emergency First Aid at Work and Level 3 Award in First Aid at Work courses give people the practical skills and knowledge to act fast and effectively in a real-life emergency.

What Is a Defibrillator and How Does It Work?

A defibrillator — also known as an AED (Automated External Defibrillator) — is a portable device designed to deliver a jolt of energy to the heart when someone is in sudden cardiac arrest (SCA).

Cardiac arrest happens when the heart suddenly stops pumping blood around the body, often due to an irregular rhythm known as ventricular fibrillation. The shock from an AED can restore the heart’s normal rhythm, buying crucial time until emergency services arrive.

Modern defibrillators are designed for public use and are incredibly simple to operate. Once turned on, the device provides step-by-step voice and visual instructions. It will analyse the person’s heart rhythm automatically and will only deliver a shock if it detects that one is needed — making it safe even for untrained users.

How to Use a Defibrillator

If you come across someone who has collapsed and is unresponsive:

Even if you’ve never used an AED before, it’s designed to guide you through every step clearly and calmly.

Where to Find Defibrillators in the UK

There are now tens of thousands of public-access defibrillators across the UK — and the number is growing every year. You’ll commonly find them in:

In many UK towns, you’re never more than a few minutes away from a defibrillator. The location of registered AEDs can be found through emergency dispatchers when you call 999, or by checking databases like The Circuit – The National Defibrillator Network, run by the British Heart Foundation.

Why Defibrillators Are Life-Saving

According to the Resuscitation Council UK, approximately 30,000 people suffer an out-of-hospital cardiac arrest in the UK each year, with 80% occurring in the home. Sadly, survival rates remain low — less than 1 in 10 — but when CPR and defibrillation are started immediately, survival rates can rise to as high as 70%.

A defibrillator restores the heart’s rhythm, but time is critical — for every minute without CPR or defibrillation, the chance of survival falls by 7-10%. This is why community access and public confidence in using these devices are so vital.

Get Trained – Make a Difference

While AEDs are simple to use due to their verbal instructions, understanding when and how to act can make your response faster and more confident. TEAM Safety Services offers nationally accredited first aid qualifications designed to equip your team with essential life-saving skills:

Our in-person courses combine hands-on practical sessions with expert instruction — ensuring every delegate leaves feeling confident and prepared to act when it matters most.

Knowing how to use a defibrillator could one day save a colleague, a friend, or even a stranger. By learning first aid and familiarising yourself with the AEDs in your area, you become part of a growing network of life-savers across the UK.

If you’d like to train your staff in First Aid and Defibrillator Awareness, contact TEAM Safety Services today to book your place on our Level 3 First Aid courses.