Transcript for how to use a defibrillator video

Paramedic Karen Walling is in the Imperial War Museum.

Karen says to the camera: “Hello, I’m here today at the Imperial War Museum to talk to your about cardiac arrest, how to recognise when someone’s in a cardiac arrest and what you can do to save someone’s life using one of these public-access defibrillators.

“Cardiac arrest is when a patient’s heart has stopped. The blood and the oxygen are no longer circulating around the body and the patient will not be breathing. This is a life-threatening emergency and you need to act quickly.”

Change of camera shot. Karen is kneeling behind a defibrillator and a resuscitation training mannequin in the museum.

Karen: “The first thing you need to do is dial 999 for an ambulance and we’ll be with you as soon as we can.

“In the meantime, you need to start to perform basic life support. By doing this, you’re keeping the blood and oxygen circulating around the body and keeping that brain alive until help arrives.

“For every minute basic life support is not being performed your chances of survival are reduced by about 14 per cent.”

The camera cuts to a close up of the defibrillator.

Karen: “The next thing you need is one of these. This is a public-access defibrillator.”

The camera cuts back to Karen behind the training mannequin.

Karen: “Now we have around 600 of these across London in all sort of public places: railway stations, airports, art galleries and museums. They’re very, very simple to use and it’s what’s going to give the patient the best chances of survival.

“These machines are very simple and safe to use. Simply turn the machine on and take the pads out of the packet, and apply them to the patient’s bare chest as indicated.”

Karen holds up the defibrillator pads and then attaches them to the training mannequin.

The automated voice on the defibrillator says in the background: “Connect electrodes.”

Karen: “You will then simply follow the prompts on the screen. They may be audible or they will be in the lid.”

Defibrillator: “Connect electrodes.”

Karen: “Once the leads are connected to the patient’s chest, the machine will analyse what heart rhythm the patient’s heart is in. Remember this machine will only recognise when a patient is in cardiac arrest.”

Defibrillator: “Connect electrodes.”

Karen: “If it recognises a patient is in cardiac arrest, it will then ask you to deliver a shock to the patient in order to restart the patient’s heart.”

Camera moves to close up of the defibrillator.

Defibrillator: “Stand clear! Ananlysing now, stand clear!” The defibrillator then makes a noise in preparation to shock.

Karen: “Once it’s analysed the rhythm it’s going to ask you to press the shock button.”

Another close up of the defibrillator.

Defibrillator: “Stand clear! Push shock button.” The defibrillator makes an alert sound and Karen pushes the shock button.

Karen: “Now remember these machines are very safe. They will only deliver a shock to a patient in cardiac arrest. You cannot shock a live patient; the machine simply won’t let you. These machines are very safe and you cannot make a mistake.

“These machines are not only used by healthcare professionals now, they can be used by the public also.”

Camera cuts back to Karen standing in the museum.

Karen: “Remember: if you do nothing for somebody they’ve got no chance, if you do something you’re going to give them some chance.”

Karen: “The London Ambulance Service is working closely with the British Heart Foundation in order to raise awareness of cardiac arrest.

Contact details are displayed.

 “For further information contact us on 020 7783 2534 or look on our website at and search for ‘save a life’.”

Details of various venues where defibrillators can be found in London are displayed.