A sudden cardiac arrest (SCA) often occurs without any warning when the electrical activity of a heart becomes so chaotic that it stops pumping blood around the body. In the UK, there are 30,000 cardiac arrests each year out of hospital, and only one in 10 victims survive to be discharged.
When someone suffers an SCA, every minute that goes by without them receiving help decreases their chance of survival by 10%. Even an untrained person can take action to help someone suffering from an SCA, help which could potentially be life saving.