ACLS Study Guide 2026

The BLS Survey, according to AHA guidelines, focuses on immediate life-saving actions for cardiac arrest. It involves quickly assessing for responsiveness, activating the emergency medical services (EMS) and retrieving an AED, initiating high-quality chest compressions to ensure circulation, and performing early defibrillation if a shockable rhythm is present. This sequence prioritizes rapid assessment and intervention.

An essential component of a dynamic and effective resuscitation team is having a single, clear team leader who directs actions, assigns roles, and ensures smooth communication. Multiple leaders can lead to confusion, conflicting instructions, and disorganization, hindering efficient patient care during a critical event. Clear roles, closed-loop communication, and knowing one's limitations are all vital for team success.

For an adult patient in respiratory arrest who still has a pulse, the recommended ventilation rate using a bag-valve-mask is one breath every 5 to 6 seconds, which equates to 10 to 12 breaths per minute. This rate provides adequate oxygenation and ventilation without causing hyperventilation, which can negatively impact cardiac output and cerebral blood flow.

By definition, bradycardia (or bradyarrhythmia) refers to any heart rhythm disorder where the heart rate is less than 60 beats per minute. While symptomatic bradycardia often involves rates below 50 bpm, the general definition of bradycardia starts at <60 bpm, indicating a slower-than-normal heart rate.

The primary pharmacologic treatment for pulseless electrical activity (PEA) in the ACLS algorithm is epinephrine. Epinephrine's vasoconstrictive effects help to increase coronary and cerebral perfusion pressure during CPR, improving the chances of return of spontaneous circulation. While identifying and treating reversible causes is crucial, epinephrine is administered concurrently.

Before initiating any patient assessment or intervention, the very first step in any emergency situation is to ensure scene safety. Rescuers must protect themselves from hazards before approaching a victim. Only after confirming the scene is safe can the BLS assessment (checking responsiveness, activating EMS, etc.) begin.