First aid CPR NHS.
These are now common and are easily accessible with mobile phones. CPR with rescue breaths. If you have been trained in CPR, including rescue breaths, and feel confident using your skills, you should give chest compressions with rescue breaths. If you're' not completely confident, attempt hands-only CPR instead.
Cardiopulmonary resuscitation Wikipedia.
In a 2010 prospective study of cardiac arrest in children age 117 for arrests with a non-cardiac cause, provision by bystanders of conventional CPR with rescue breathing yielded a favorable neurological outcome at one month more often than did compression-only CPR OR 5.54.
CPR illustrated in three simple steps.
Each breath should take 1 second. CONTINUE WITH 30 PUMPS AND 2 BREATHS UNTIL HELP ARRIVES. NOTE: This ratio is the same for one-person two-person CPR. In two-person CPR the person pumping the chest stops while the other gives mouth-to-mouth breathing.