One of the most urgent situations faced by nurses is cardiac arrest. Knowledge of cardiopulmonary resuscitation (CPR) is essential for survival after intra-or out-of-hospital cardiac arrest. Two of the main factors predicting survival after a cardiopulmonary arrest are the immediate start of CPR and early activation of the survival chain. In 2005 The European Resuscitation Council published new recommendations on CPR. The changes center on simplification of the protocol, giving greater importance to chest compressions than to mouth-to-mouth breath resuscitation. After checking that the victim is not breathing, 30 compressions must be immediately given. The first 2 rescue breaths and carotid pulse checking have been eliminated. The current recommended ratio of chest compressions-breaths is 30:2.