5.0 AED for All Ages BLS Practice Quiz
48 exam-style questions covering 16% of the BLS exam. Instant feedback on every answer, progress tracking, no signup required.
This domain is part of the Basic Life Support (BLS) practice test. Each question is tagged by exam objective and difficulty so you can drill exactly the areas you need.
Sample Questions
According to AHA Part 4, what does the AED do after it analyzes the heart rhythm?
- A. It starts chest compressions automatically
- B. It always delivers a shock regardless of the rhythm
- C. It sends the rhythm to a physician for interpretation
- D. It identifies the rhythm as shockable or nonshockable and advises accordingly
AHA Part 4 says the AED identifies abnormal heart rhythms as shockable or nonshockable.
A patient receives a shock from an AED and circulation appears to return. Which set of findings does AHA Part 4 cite as signs of ROSC?
- A. Continued absence of any pulse or movement
- B. AED prompting 'shock advised' a second time
- C. Breathing, coughing, or movement plus a palpable pulse or measurable blood pressure
- D. Cyanosis and cool extremities
AHA Part 4 lists breathing, coughing, or movement and a palpable pulse or measurable blood pressure as signs of ROSC.
When the AED prompts 'Analyzing heart rhythm. Do not touch the patient,' what does AHA Part 4 require?
- A. Clear the person, ensure no one is touching them, not even the rescuer giving breaths
- B. Continue compressions to maintain perfusion during analysis
- C. Hold the patient firmly by the shoulders
- D. Apply oxygen by mask during the analysis
AHA Part 4 instructs the rescuer to clear the person for rhythm analysis, ensuring no one is touching them, not even the rescuer in charge of giving breaths.
AHA Part 4 says minimizing the time between last compression and shock requires practice and coordination between which two team roles?
- A. Family liaison and documentation recorder
- B. The Compressor and the AED operator
- C. Hospital security and pharmacy technician
- D. Phone caller and bystander coordinator
AHA Part 4 states the practice and coordination needed is especially between the rescuer providing compressions and the rescuer operating the AED.
An adult cardiac arrest victim has a very hairy chest and the AED displays 'check electrodes.' Which response matches AHA Part 4 guidance?
- A. Continue trying to apply the same pads repeatedly until they stick
- B. Skip pads and deliver compressions only, the AED is unusable
- C. Use a razor to shave the area; if no razor is available and you have a second set of pads, press and quickly pull off the first set to remove hair, then apply the second set
- D. Wet the chest hair until pads adhere
AHA Part 4 says to use a razor or clippers; if no razor is available but a second set of pads is on hand, press and quickly pull the first set off to remove hair, then apply the new set.
AHA Part 4 explains how pulseless ventricular tachycardia (pVT) becomes life-threatening. Which mechanism does the manual describe?
- A. The atria fibrillate while the ventricles pace normally
- B. The heart rate becomes dangerously slow below 30 per minute
- C. The SA node shuts down completely and the heart stops all activity
- D. The ventricles pump so quickly and inefficiently that there is no detectable pulse
AHA Part 4 says in extremely severe cases, the ventricles pump so quickly and inefficiently that there is no detectable pulse, which is the 'pulseless' in pVT.
AHA Part 4 sets a specific time goal for completing the first two AED steps after the device arrives. What is that goal?
- A. Take at least 2 minutes to ensure proper setup
- B. There is no time goal for the first AED steps
- C. Spend 5 minutes preparing before turning on the device
- D. Try to complete steps 1 and 2 within 30 seconds after the AED arrives
AHA Part 4 instructs rescuers to try to perform the first 2 steps, power on, then apply pads, within 30 seconds after the AED arrives, while a second rescuer continues CPR.
AHA Part 4 describes ventricular fibrillation. Which statement matches the manual's description?
- A. The ventricles beat in a slow, organized pattern
- B. The SA node fires twice per beat causing a double-pumping effect
- C. The atria contract too rapidly while the ventricles remain normal
- D. The electrical activity becomes chaotic and the heart muscles quiver in a fast, unsynchronized way so the heart does not pump blood
AHA Part 4 describes VF as chaotic electrical activity that makes the heart muscles quiver in a fast, unsynchronized way so the heart does not pump blood.
Key Terms in This Domain
- Compression Depth: Adults: ≥2 inches (5 cm). Child: ~2 inches (5 cm) or 1/3 chest depth. Infant: ~1.5 inches (4 cm) or 1/3 chest depth.
- Pulse Check: Adult/child: carotid pulse (or femoral). Infant: brachial pulse. Check no more than 10 seconds.
- Pediatric AED Pads: Use pediatric pads/dose attenuator on infants and children under 8 if available; adult pads acceptable if not.
- Compression-to-Ventilation Ratio: 30:2 for single-rescuer adult/child/infant. 15:2 for 2-rescuer infant/child. Continuous compressions with advanced airway.
- Rescue Breathing: Without compressions: 1 breath every 6 seconds (adults), 1 every 2-3 seconds (children/infants). Each breath ~1 second.
- Choking: Infant: 5 back blows then 5 chest thrusts, alternating, until object expelled or unresponsive.
- AED Use: Turn on, attach pads, allow rhythm analysis, clear and shock if advised, resume CPR immediately for 2 minutes.
- High-Quality CPR: Push hard (≥2 in / 5 cm adults), push fast (100-120/min), allow full recoil, minimize interruptions, and avoid excessive ventilation.
- Compression Rate: 100-120 compressions per minute for all ages.
- Chest Recoil: Allow the chest to return fully between compressions; leaning prevents venous return and reduces CPR effectiveness.
Link to this quiz
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Other BLS Domains
- 1.0 Course Concepts and Chain of Survival
- 2.0 Assessment and High-Performance Teams
- 3.0 Adult BLS (1- and 2-Rescuer)
- 4.0 Pediatric BLS (Children and Infants)
- 6.0 Alternate Ventilation and Advanced Airways
- 7.0 Choking Relief Across Ages
- 8.0 Special Emergencies and Recovery
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