1) Basic life support (BLS) involves providing cardiopulmonary resuscitation (CPR) to victims of cardiac arrest. It includes assessing the scene and victim, activating emergency services, performing chest compressions and rescue breathing.
2) When performing CPR, rescuers should push hard and fast at a rate of 100 compressions per minute, with complete chest recoil between compressions. Rescue breaths should be provided over 1 second each, with a 30:2 compression to ventilation ratio.
3) An automated external defibrillator (AED) delivers an electric shock to potentially restart the heart during ventricular fibrillation and should be used as soon as available if the victim is not