Sadly most people do not survive after a cardiac arrest. Those with complex medical problems are much less likely to make a full recovery. It is important that you know that:
Patients are often critically unwell after CPR and may need more treatment in a coronary care or intensive care unit
Most patients do not return to the physical or mental health they had before they had CPR. Some may need a lot of rehabilitation. Unfortunately some patients go into a coma from which they might not recover or might suffer from brain damage.