The 2015 Guidelines Update provides revised guidance on ethical issues and terminating resuscitative efforts related to cardiac arrest. The ethical principles have not changed since the 2010 publication. Updates were made to several sections based on repeated discussions of ethics issues during the ILCOR evidence review process in 2015. The results of the AHA Guidelines revision indicate several scientific changes that significantly impact ethical decision making for patients near cardiac arrest, during cardiac arrest, and after cardiac arrest. Multiple guidelines on withholding and withdrawing CPR and prognostic factors for neonatal, pediatric, and adult in-hospital and out-of-hospital cardiac arrest are outlined.