• CAB/Critical Concepts• Cardiac Arrest Chain of Survival• Adult BLS Algorithm for Health Care Professionals• Cardiac Arrest in Pregnancy Algorithm for Health Care Professionals• Pediatric BLS Algorithm (Infants to Puberty) for Health Care Professionals-Single Rescuer• Pediatric BLS Algorithm (Infants to Puberty) for Health Care Professionals-2 or More Rescuers• Summary of High-Quality CPR Components for BLS Professionals• Relief of Foreign-Body Airway Obstruction