Millions of healthcare professionals worldwide rely on the American Heart Association’s Guidelines for Cardiopulmonary Resuscitation (CPR) andEmergency Cardiovascular Care (ECC) in their mission to save more lives.These guidelines are based on a systematic, evidence-based review of resuscitation science. The science is always changing, which is why American Heart Association Guidelines for CPR and ECC are updated everyfive years, with additional Scientific Statements released when necessary. In late 2010, the American Heart Association will publish new guidelines for CPR and ECC based on the scientific consensus of leaders in international resuscitation science. The guidelines reflect our continued commitment to save lives by updating resuscitation science, training, and education, and to improve the quality of care given by lay rescuers and healthcare providers.