GoodSAM volunteers with basic life-support skills can respond to life-threatening emergencies, like a cardiac arrest, via the GoodSAM app on their smartphone.
Early CPR and defibrillation can more than double someone’s chances of survival. Both of these can be performed by a member of the public before the ambulance service arrives.

How does GoodSAM work?
When a 999 call is assessed as life-threatening, the ambulance service automatically sends the location to the GoodSAM app.
The nearest available registered responder is alerted. If they cannot respond, the alert is passed to the next nearest responder.
Responders are also directed to the nearest defibrillator.
The system uses GPS to match life-threatening emergencies with the closest trained responders.
Who can be a responder?
Anyone can help save a life by learning CPR and how to use a defibrillator. You can learn what to do at one of our upcoming training events, then register on the GoodSAM app. Select London Ambulance Service as the verifying organisation.