Cardiac arrest = Ventricular Fibrillation (VF). This is when the electrical signals in the heart get confused such that the heart stops beating and fibrillates, or quivers. It is like someone threw the off switch. No blood is pumped and the patient dies in ten minutes or so, unless CPR (which keeps some oxygen going to the brain) is followed by defibrillation, which stops the erroneous electrical signals and allow regular beating to happen. 95% of people who have a cardiac arrest outside of a hospital die of it. When someone dies of a cardiac arrest from out of the blue, it is called Sudden Cardiac Death.
I had a cardic arrest last August. I was driving to the shops in my car. If it wasn't for the two strangers who came to my aid and did CPR, I would be an SCD.
Question for th eBBC, Sun, Telegraph etc - could you please learn the difference ?
This charity is working on raising awareness of SCD and installing defibrillators in public places, to improce SCD survival rates.