Why every minute matters in a cardiac emergency

Understand how every minute without defibrillation reduces survival - and why AEDs matter

When someone experiences a sudden cardiac arrest, urgent treatment is crucial. Without quick and effective help, survival rates fall rapidly – around 10% for every minute without intervention.
That’s why fast access to a defibrillator or an AED defibrillator is an absolute must and can make a life-saving difference.

Did you know that using an automated defibrillator within the first 3-5 minutes can increase survival rates to as high as 70%? In those vital moments, having access to the right AED nearby and knowing how to use it can change everything.

Where Defibrillators are most effective

A defibrillator can only save a life if it can be reached quickly, which is why resources like The Circuit are so useful. The Circuit is the UK’s national defibrillator network, which pinpoints the nearest defibrillator near you - an invaluable resource that can make a huge difference. For someone to locate the closest defibrillator, the device has to be registered on the website, so if your organisation has one, be sure to register it!

It’s important that AEDs are also located in accessible locations and clearly signed, so people know how to find them. Common locations for defibrillators are:

  • Schools, campuses and colleges
  • Town centres
  • Offices and workplaces
  • Leisure centres and gyms
  • Community venues
  • Shopping centres

Not only does a registered AED on The Circuit’s website provide valuable information to the bystander, but it also provides information to emergency services, who can direct you to the
nearest available defibrillator during a 999 call.

Defibrillator training and public confidence

While AEDs are designed to be used by anyone, even those without experience, defibrillator training is a great asset to have and builds confidence. Instead of a responder panicking, having undergone training will help them act more quickly in an emergency.

St John Ambulance offers defibrillator training within its first aid training course.

They’ll teach you to:

  • Recognise the signs of cardiac arrest
  • How to perform CPR
  • How to use an AED safely and effectively

First aid training, combined with easy-to-use defibrillators, helps create a safer workplace and encourages bystanders to act promptly without panicking.

What to do in a cardiac emergency

If someone collapses and becomes unresponsive, the following steps are vital:

  • Call 999 immediately
  • Check if they are breathing
  • Begin CPR if they are not breathing (30 compressions, 2 rescue breaths)
  • Use an AED defibrillator as soon as it’s available
  • Continue until emergency services arrive

If you need to use a defibrillator, all you need to do is follow the steps via voice or visual prompts. The AED will guide you step-by-step. From pad placement to shock delivery.

Creating safe spaces with St John Ambulance

Choosing a defibrillator from St John Ambulance means choosing trusted expertise, clear guidance and reliable equipment (designed by experts).

St John Ambulance AEDs offers:

  • Expert-designed, life-saving technology
  • Reassurance in high-pressure situations
  • Clear guidance and instructions for effective treatment