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AHA BLS CPR Numbers, Chain of Survival Links, & Team Dynamics Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
How does high-quality CPR improve outcomes in cardiac arrest?✔✔It maintains blood flow to vital organs until defibrillation or ROSC is achieved.
What should you do if you witness a sudden collapse in a public setting?✔✔Activate EMS, start CPR immediately, and send someone for an AED.
What is the most common preventable error in bystander CPR?✔✔Not pushing hard or fast enough during chest compressions.
How can rescuers ensure effective team dynamics during cardiac arrest?✔✔Clear communication, role clarity, and constructive feedback during pauses.
What physiological change makes CPR effective in cardiac arrest?✔✔Manual compressions create artificial circulation to oxygenate vital organs. 1 / 3
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Why is post-cardiac arrest care included in the Chain of Survival?✔✔To prevent recurrence and mitigate brain injury after ROSC is achieved.
What is the minimum chest compression depth recommended for an adult during CPR?✔✔At least 2 inches (5 cm) but avoid exceeding 2.4 inches (6 cm).
How do you check for responsiveness in a potential cardiac arrest victim?✔✔Tap their shoulder and shout "Are you okay?" while looking for movement or verbal response.
What is the correct hand placement for chest compressions on an adult?✔✔Heel of one hand on the center of the chest (lower half of sternum), other hand on top interlocked.
Why is it important to allow full chest recoil between compressions?✔✔Incomplete recoil reduces blood flow to the heart and decreases CPR effectiveness.
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What is the first link in the adult Chain of Survival?✔✔Immediate recognition of cardiac arrest and activation of emergency response.
How many rescue breaths should be given during CPR if an advanced airway is in place?✔✔Continuous compressions with 1 breath every 6 seconds (10 breaths per minute).
What is the compression-to-ventilation ratio for single rescuer adult CPR?✔✔30 compressions to 2 ventilations.
What critical action should be taken immediately after AED pad placement?✔✔Allow the AED to analyze the rhythm and deliver shock if advised.
How often should rescuers switch roles during team CPR to prevent fatigue?✔✔Every 2 minutes or after 5 cycles of CPR (when rhythm check occurs).
What is the proper rate for performing chest compressions during CPR?✔✔100 to 120 compressions per minute.
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