High-quality CPR, comprising manual chest compressions and ventilation, is the foundation of lifesaving resuscitation for cardiac arrest victims. Maintaining blood flow to the heart and brain is the first priority, ahead of other interventions, such as administering medications. Individuals and teams should focus on maintaining cardiac output at all times during an attempted resuscitation for cardiac arrest.   The goal of the 2020 Guidelines AHA Basic Life Support (BLS) course is to train participants to save the lives of victims in cardiac arrest through high-quality CPR. The AHA designed the BLS Course to teach healthcare professionals how to perform high-quality CPR individually or as part of a team. BLS skills are applicable to any healthcare setting. BLS students will learn rescue techniques for adults, children, and infants.