We do not hold national figures on survival after out of hospital cardiac arrest but London ambulance service analyses from 2005-06 show a survival rate of 10.9 per cent. for arrests witnessed by bystanders in London.
Treatment of heart attacks is audited nationally through the Myocardial Infarction National Audit Project, which has links to mortality data held by the Office for National Statistics. It is therefore possible to determine the mortality rate for those suffering a heart attack who receive treatment. Latest available figures (2005-06) indicate that the survival rate (all ages) for those who experience a heart attack and receive treatment is just over 90 per cent. For under 75-year-olds who experience a heart attack there is just over 95 per cent. chance of survival.