Sudden cardiac arrest is a serious condition that may lead to death if not adequately a-handled. Ventricular fibrillation (VF) or ventricular tachycardia (VT) are common in the majority of deaths due to cardiac arrest. The unique treatment is defibrillation in both arrhythmias. Life rescue chain to achive a succesful result includes communication with the emergency team, early basic life support, early defibrillation and early advanced life support after cardiac arrest. The team constitued by the American Heart Association (ANA) and the European Rescucitation Council (ERC) prepared the 2005 guideline by reviewing the 2000 guideline on emergency cardiovascular care and cardiopulmonary resuscitation (CPR). The main changes in the 2005 guideline are as follows: Rescuer should decide to open advanced airway considering both the benefits and the risks of this intervention. Rescuer should do clinical examination and use devices to facilitate examination to minimize the risks due to misplacement or displacement of the airway tube. CPR should be started after one shock, pulse and rthym should not be checked after the shock, but should be checked after (compression/ventilation ratio should be 30/2 in each cycle) 5 cycles of CPR. Cocuklarda manuel defibrilator kullanildiginda; ilk ve takip eden soklarda 4J/kg'hk bit doz (bifazik ya da monofazik dalga formu ile) kullanilmahdir. Ventrikiler fibrilasyon/ventrikiler tasikardi tek sokla tedavi edilmelidir. Soku derhal baslatilan KPR (15 kompresyon/2 ventilasyon) izlemelidir. When a manual defibrillator is used for children, the dose should be 4J/kg (with biphasic or monophasic waveform) for the primary and sequential shocks. VF/VT should cured with one shock, and CPR (15 compression/2 ventilation) should started immediately after that. This rewiev includes last changes of advanced life support for adults, children and newborns comparing the 2000 and 2005 AHA Guidelines.