HEARTCODE BLS | QUESTIONS AND 100% CORRECT
WELL DETAILED ANSWERS | LATEST UPDATE 2026 |
GUARANTEED PASS | GRADED A+ | VERIFIED |
VERSION 2.0 — ADVANCED CLINICAL EDITION
TABLE OF CONTENTS
Section Topic Questions
I Adult BLS – High-Quality CPR & Compression Science 1–20
II Adult BLS – Ventilation, Airway Management & Oxygenation 21–35
III AED Utilization, Defibrillation & Electrical Therapy 36–50
IV Pediatric BLS – Child CPR & Resuscitation Science 51–65
V Pediatric BLS – Infant CPR & Updated Compression Techniques 66–80
VI Foreign Body Airway Obstruction – New 5+5 Choking Protocol 81–95
VII Opioid Overdose & Naloxone – Integrated BLS Algorithm 96–105
BLS Team Dynamics, High-Performance Teams & Crisis Resource
VIII 106–120
Management
IX Special Resuscitation Situations & Patient Populations 121–135
,Section Topic Questions
X BLS Algorithms, Unified Chain of Survival & Comprehensive Review 136–150
SECTION I: ADULT BLS – HIGH-QUALITY CPR & COMPRESSION SCIENCE
Q1. A 72-year-old male is found unresponsive in a hospital bed. He is not breathing and
has no palpable carotid pulse. According to the 2025 AHA guidelines, where should CPR be
initiated?
A. After transferring the patient to a CPR bed with a backboard
B. After moving the patient to the floor for optimal compression surface
C. Where the patient is found, as long as high-quality CPR can be delivered safely and
effectively
D. Only after the rapid response team arrives with a mechanical CPR device
Rationale: The 2025 AHA guidelines explicitly state that resuscitation should generally be
conducted where the patient is found, as long as high-quality CPR can be administered safely
and effectively. Delays caused by unnecessary patient movement are associated with worse
outcomes. A firm surface is preferred, but CPR should not be delayed to move the patient
unless the current location prevents effective compressions.
Q2. During adult CPR, you are performing compressions at a depth of 1.8 inches (4.6 cm).
What is the most appropriate action?
A. Continue at this depth as it is within the acceptable range
B. Decrease depth to 1.5 inches to minimize the risk of rib fractures
C. Increase depth to at least 2 inches (5 cm) but not exceed 2.4 inches (6 cm)
D. Increase depth to 3 inches for maximum cardiac output
Rationale: The 2025 AHA guidelines maintain that adult compression depth should be at
least 2 inches (5 cm) with a maximum of 2.4 inches (6 cm). The guidelines also add a new
emphasis on avoiding excessive compression (>6 cm) to reduce the risk of rib fractures and
,other injuries. A depth of 1.8 inches is inadequate to generate sufficient coronary perfusion
pressure.
Q3. A healthcare provider is performing CPR on an adult. The provider's compression rate
is 140 compressions per minute. What physiologic consequence is most likely?
A. Increased stroke volume due to faster ventricular filling
B. Improved coronary perfusion pressure
C. Reduced ventricular filling time, leading to decreased stroke volume and cardiac
output
D. No significant hemodynamic effect
Rationale: Compression rates above 120/min reduce the time available for ventricular filling
during the relaxation phase, decreasing preload, stroke volume, and ultimately cardiac output.
The optimal rate is 100–120 compressions per minute.
Q4. You are the compressor in a two-rescuer adult CPR scenario. At what interval should
you and your partner switch roles?
A. Every 10 cycles or 4 minutes
B. Every 5 cycles or approximately 2 minutes
C. Every 3 cycles or 1 minute
D. Only when the compressor reports fatigue
Rationale: To prevent compressor fatigue and maintain high-quality compressions, team
roles should alternate every 5 cycles or approximately 2 minutes. Research demonstrates that
compression depth begins to decrease after 90 to 120 seconds of CPR.
Q5. A 65-year-old female collapses in a shopping mall. She is unresponsive, not breathing
normally, and has no pulse. A lone lay rescuer is present. What is the correct sequence of
actions according to the 2025 AHA guidelines?
A. Begin CPR immediately, then call 911 after 2 minutes
B. Activate the emergency response system first, then immediately begin CPR
, C. Check for a pulse for 10 seconds, then call 911
D. Give 2 rescue breaths, then call 911
Rationale: The 2025 AHA guidelines state that after identifying an adult in cardiac arrest, a
lone responder should activate the emergency response system first, and then immediately
begin CPR. This prioritizes early activation of EMS while minimizing delay to the first
compression.
Q6. What is the maximum allowable interruption time for chest compressions during CPR?
A. 5 seconds
B. 10 seconds
C. 15 seconds
D. 20 seconds
Rationale: The 2025 AHA guidelines emphasize that interruptions in CPR should be
minimized and pauses in chest compressions should be less than 10 seconds. This applies to all
age groups and is critical for maintaining coronary and cerebral perfusion pressure.
Q7. Which of the following is NOT a component of high-quality CPR as defined by the 2025
AHA guidelines?
A. Compression rate of 100–120/min
B. Compression depth of at least 2 inches (5 cm) in adults
C. Allowing complete chest recoil between compressions
D. Delivering 20 breaths per minute during bag-mask ventilation
Rationale: Hyperventilation during CPR increases intrathoracic pressure, decreases venous
return, and reduces coronary perfusion. The 2025 guidelines continue to emphasize avoiding
excessive ventilations. The correct ventilation rate without an advanced airway is 30:2
(approximately 10 breaths per minute), and with an advanced airway, one breath every 6
seconds (10 breaths per minute).
Q8. During CPR, you notice the patient's chest does not fully recoil between compressions.
What is the most significant hemodynamic consequence?
WELL DETAILED ANSWERS | LATEST UPDATE 2026 |
GUARANTEED PASS | GRADED A+ | VERIFIED |
VERSION 2.0 — ADVANCED CLINICAL EDITION
TABLE OF CONTENTS
Section Topic Questions
I Adult BLS – High-Quality CPR & Compression Science 1–20
II Adult BLS – Ventilation, Airway Management & Oxygenation 21–35
III AED Utilization, Defibrillation & Electrical Therapy 36–50
IV Pediatric BLS – Child CPR & Resuscitation Science 51–65
V Pediatric BLS – Infant CPR & Updated Compression Techniques 66–80
VI Foreign Body Airway Obstruction – New 5+5 Choking Protocol 81–95
VII Opioid Overdose & Naloxone – Integrated BLS Algorithm 96–105
BLS Team Dynamics, High-Performance Teams & Crisis Resource
VIII 106–120
Management
IX Special Resuscitation Situations & Patient Populations 121–135
,Section Topic Questions
X BLS Algorithms, Unified Chain of Survival & Comprehensive Review 136–150
SECTION I: ADULT BLS – HIGH-QUALITY CPR & COMPRESSION SCIENCE
Q1. A 72-year-old male is found unresponsive in a hospital bed. He is not breathing and
has no palpable carotid pulse. According to the 2025 AHA guidelines, where should CPR be
initiated?
A. After transferring the patient to a CPR bed with a backboard
B. After moving the patient to the floor for optimal compression surface
C. Where the patient is found, as long as high-quality CPR can be delivered safely and
effectively
D. Only after the rapid response team arrives with a mechanical CPR device
Rationale: The 2025 AHA guidelines explicitly state that resuscitation should generally be
conducted where the patient is found, as long as high-quality CPR can be administered safely
and effectively. Delays caused by unnecessary patient movement are associated with worse
outcomes. A firm surface is preferred, but CPR should not be delayed to move the patient
unless the current location prevents effective compressions.
Q2. During adult CPR, you are performing compressions at a depth of 1.8 inches (4.6 cm).
What is the most appropriate action?
A. Continue at this depth as it is within the acceptable range
B. Decrease depth to 1.5 inches to minimize the risk of rib fractures
C. Increase depth to at least 2 inches (5 cm) but not exceed 2.4 inches (6 cm)
D. Increase depth to 3 inches for maximum cardiac output
Rationale: The 2025 AHA guidelines maintain that adult compression depth should be at
least 2 inches (5 cm) with a maximum of 2.4 inches (6 cm). The guidelines also add a new
emphasis on avoiding excessive compression (>6 cm) to reduce the risk of rib fractures and
,other injuries. A depth of 1.8 inches is inadequate to generate sufficient coronary perfusion
pressure.
Q3. A healthcare provider is performing CPR on an adult. The provider's compression rate
is 140 compressions per minute. What physiologic consequence is most likely?
A. Increased stroke volume due to faster ventricular filling
B. Improved coronary perfusion pressure
C. Reduced ventricular filling time, leading to decreased stroke volume and cardiac
output
D. No significant hemodynamic effect
Rationale: Compression rates above 120/min reduce the time available for ventricular filling
during the relaxation phase, decreasing preload, stroke volume, and ultimately cardiac output.
The optimal rate is 100–120 compressions per minute.
Q4. You are the compressor in a two-rescuer adult CPR scenario. At what interval should
you and your partner switch roles?
A. Every 10 cycles or 4 minutes
B. Every 5 cycles or approximately 2 minutes
C. Every 3 cycles or 1 minute
D. Only when the compressor reports fatigue
Rationale: To prevent compressor fatigue and maintain high-quality compressions, team
roles should alternate every 5 cycles or approximately 2 minutes. Research demonstrates that
compression depth begins to decrease after 90 to 120 seconds of CPR.
Q5. A 65-year-old female collapses in a shopping mall. She is unresponsive, not breathing
normally, and has no pulse. A lone lay rescuer is present. What is the correct sequence of
actions according to the 2025 AHA guidelines?
A. Begin CPR immediately, then call 911 after 2 minutes
B. Activate the emergency response system first, then immediately begin CPR
, C. Check for a pulse for 10 seconds, then call 911
D. Give 2 rescue breaths, then call 911
Rationale: The 2025 AHA guidelines state that after identifying an adult in cardiac arrest, a
lone responder should activate the emergency response system first, and then immediately
begin CPR. This prioritizes early activation of EMS while minimizing delay to the first
compression.
Q6. What is the maximum allowable interruption time for chest compressions during CPR?
A. 5 seconds
B. 10 seconds
C. 15 seconds
D. 20 seconds
Rationale: The 2025 AHA guidelines emphasize that interruptions in CPR should be
minimized and pauses in chest compressions should be less than 10 seconds. This applies to all
age groups and is critical for maintaining coronary and cerebral perfusion pressure.
Q7. Which of the following is NOT a component of high-quality CPR as defined by the 2025
AHA guidelines?
A. Compression rate of 100–120/min
B. Compression depth of at least 2 inches (5 cm) in adults
C. Allowing complete chest recoil between compressions
D. Delivering 20 breaths per minute during bag-mask ventilation
Rationale: Hyperventilation during CPR increases intrathoracic pressure, decreases venous
return, and reduces coronary perfusion. The 2025 guidelines continue to emphasize avoiding
excessive ventilations. The correct ventilation rate without an advanced airway is 30:2
(approximately 10 breaths per minute), and with an advanced airway, one breath every 6
seconds (10 breaths per minute).
Q8. During CPR, you notice the patient's chest does not fully recoil between compressions.
What is the most significant hemodynamic consequence?
