American Red Cross Advanced
Cardiovascular Life Support (ACLS)
Certification Examination Questions
And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. A healthcare provider finds an adult patient unresponsive and not
breathing normally. After confirming scene safety, what is the most
appropriate immediate action?
A. Obtain a 12-lead ECG before beginning treatment
B. Activate the emergency response system and begin high-quality CPR
while obtaining an AED/defibrillator
C. Administer epinephrine immediately
D. Establish an IV line before starting compressions
Answer: B. Activate the emergency response system and begin high-
quality CPR while obtaining an AED/defibrillator
Rationale: An unresponsive adult who is not breathing normally
should be treated as being in cardiac arrest after rapid assessment.
Immediate activation of the emergency response system, initiation of
high-quality CPR, and rapid access to a defibrillator are central
priorities. Delaying chest compressions for vascular access, ECG
acquisition, or medications wastes valuable time. Early CPR and
defibrillation when indicated are major components of the adult
cardiac-arrest response.
, 2. During adult CPR, which compression rate is generally
recommended?
A. 60–80 compressions/min
B. 80–90 compressions/min
C. 90–100 compressions/min
D. 100–120 compressions/min
Answer: D. 100–120 compressions/min
Rationale: High-quality CPR requires chest compressions at an
appropriate rate and depth while minimizing interruptions. For adults,
a compression rate of approximately 100–120 per minute is
recommended. Compressing substantially slower may reduce blood
flow, whereas excessively rapid compressions can compromise depth
and recoil. Rescuers should also allow complete chest recoil and avoid
unnecessary pauses.
3. Which finding most strongly supports the diagnosis of cardiac
arrest in an unresponsive adult?
A. Absence of a definite pulse and normal breathing
B. Weak peripheral pulse with rapid respirations
C. Unresponsiveness with absent or abnormal breathing and no definite
pulse
D. Blood pressure below 100 mmHg systolic
Answer: C. Unresponsiveness with absent or abnormal breathing
and no definite pulse
Rationale: Cardiac arrest should be recognized rapidly by assessing
responsiveness, breathing, and circulation. Agonal gasping is not
normal breathing and should not reassure the rescuer. A pulse check
should not unnecessarily delay CPR. If the patient is unresponsive, is
,not breathing normally, and a definite pulse cannot be identified
promptly, resuscitation should begin.
4. What is the primary objective of high-quality chest compressions
during cardiac arrest?
A. Maintain coronary and cerebral perfusion
B. Increase oxygen saturation to 100% immediately
C. Produce a normal ECG rhythm
D. Reduce myocardial oxygen consumption
Answer: A. Maintain coronary and cerebral perfusion
Rationale: Chest compressions generate forward blood flow to vital
organs, particularly the heart and brain. Adequate coronary perfusion
pressure supports myocardial oxygen delivery and increases the
likelihood that defibrillation will successfully terminate a shockable
rhythm. Cerebral perfusion is also essential for limiting neurologic
injury. CPR therefore serves as a bridge to definitive interventions
such as defibrillation and treatment of reversible causes.
5. Which action best demonstrates high-quality CPR?
A. Allowing the chest to recoil only partially
B. Compressing deeply but pausing frequently
C. Maintaining appropriate depth and rate while minimizing
interruptions
D. Ventilating rapidly between every compression
Answer: C. Maintaining appropriate depth and rate while
minimizing interruptions
Rationale: High-quality CPR combines an appropriate compression
rate and depth with complete chest recoil and minimal interruptions.
Excessive pauses reduce perfusion, while incomplete recoil increases
, intrathoracic pressure and decreases venous return. Ventilation should
be coordinated appropriately rather than delivered excessively.
Continuous attention to compression quality and team performance is
essential throughout resuscitation.
6. A patient has ventricular fibrillation. Which intervention is the
definitive treatment for this shockable rhythm?
A. Defibrillation
B. Atropine
C. Adenosine
D. Synchronized cardioversion
Answer: A. Defibrillation
Rationale: Ventricular fibrillation is a shockable cardiac-arrest
rhythm. Unsynchronized defibrillation is used because there is no
organized QRS complex on which to synchronize the shock. CPR
should continue while the defibrillator is prepared, with pauses
minimized for rhythm analysis and shock delivery. After a shock, CPR
should generally resume promptly rather than waiting for a prolonged
rhythm assessment.
7. Which rhythm is classified as nonshockable during adult cardiac
arrest?
A. Ventricular fibrillation
B. Pulseless ventricular tachycardia
C. Polymorphic ventricular tachycardia
D. Asystole
Answer: D. Asystole
Rationale: Asystole is a nonshockable rhythm. Management focuses on
high-quality CPR, epinephrine according to the cardiac-arrest
Cardiovascular Life Support (ACLS)
Certification Examination Questions
And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. A healthcare provider finds an adult patient unresponsive and not
breathing normally. After confirming scene safety, what is the most
appropriate immediate action?
A. Obtain a 12-lead ECG before beginning treatment
B. Activate the emergency response system and begin high-quality CPR
while obtaining an AED/defibrillator
C. Administer epinephrine immediately
D. Establish an IV line before starting compressions
Answer: B. Activate the emergency response system and begin high-
quality CPR while obtaining an AED/defibrillator
Rationale: An unresponsive adult who is not breathing normally
should be treated as being in cardiac arrest after rapid assessment.
Immediate activation of the emergency response system, initiation of
high-quality CPR, and rapid access to a defibrillator are central
priorities. Delaying chest compressions for vascular access, ECG
acquisition, or medications wastes valuable time. Early CPR and
defibrillation when indicated are major components of the adult
cardiac-arrest response.
, 2. During adult CPR, which compression rate is generally
recommended?
A. 60–80 compressions/min
B. 80–90 compressions/min
C. 90–100 compressions/min
D. 100–120 compressions/min
Answer: D. 100–120 compressions/min
Rationale: High-quality CPR requires chest compressions at an
appropriate rate and depth while minimizing interruptions. For adults,
a compression rate of approximately 100–120 per minute is
recommended. Compressing substantially slower may reduce blood
flow, whereas excessively rapid compressions can compromise depth
and recoil. Rescuers should also allow complete chest recoil and avoid
unnecessary pauses.
3. Which finding most strongly supports the diagnosis of cardiac
arrest in an unresponsive adult?
A. Absence of a definite pulse and normal breathing
B. Weak peripheral pulse with rapid respirations
C. Unresponsiveness with absent or abnormal breathing and no definite
pulse
D. Blood pressure below 100 mmHg systolic
Answer: C. Unresponsiveness with absent or abnormal breathing
and no definite pulse
Rationale: Cardiac arrest should be recognized rapidly by assessing
responsiveness, breathing, and circulation. Agonal gasping is not
normal breathing and should not reassure the rescuer. A pulse check
should not unnecessarily delay CPR. If the patient is unresponsive, is
,not breathing normally, and a definite pulse cannot be identified
promptly, resuscitation should begin.
4. What is the primary objective of high-quality chest compressions
during cardiac arrest?
A. Maintain coronary and cerebral perfusion
B. Increase oxygen saturation to 100% immediately
C. Produce a normal ECG rhythm
D. Reduce myocardial oxygen consumption
Answer: A. Maintain coronary and cerebral perfusion
Rationale: Chest compressions generate forward blood flow to vital
organs, particularly the heart and brain. Adequate coronary perfusion
pressure supports myocardial oxygen delivery and increases the
likelihood that defibrillation will successfully terminate a shockable
rhythm. Cerebral perfusion is also essential for limiting neurologic
injury. CPR therefore serves as a bridge to definitive interventions
such as defibrillation and treatment of reversible causes.
5. Which action best demonstrates high-quality CPR?
A. Allowing the chest to recoil only partially
B. Compressing deeply but pausing frequently
C. Maintaining appropriate depth and rate while minimizing
interruptions
D. Ventilating rapidly between every compression
Answer: C. Maintaining appropriate depth and rate while
minimizing interruptions
Rationale: High-quality CPR combines an appropriate compression
rate and depth with complete chest recoil and minimal interruptions.
Excessive pauses reduce perfusion, while incomplete recoil increases
, intrathoracic pressure and decreases venous return. Ventilation should
be coordinated appropriately rather than delivered excessively.
Continuous attention to compression quality and team performance is
essential throughout resuscitation.
6. A patient has ventricular fibrillation. Which intervention is the
definitive treatment for this shockable rhythm?
A. Defibrillation
B. Atropine
C. Adenosine
D. Synchronized cardioversion
Answer: A. Defibrillation
Rationale: Ventricular fibrillation is a shockable cardiac-arrest
rhythm. Unsynchronized defibrillation is used because there is no
organized QRS complex on which to synchronize the shock. CPR
should continue while the defibrillator is prepared, with pauses
minimized for rhythm analysis and shock delivery. After a shock, CPR
should generally resume promptly rather than waiting for a prolonged
rhythm assessment.
7. Which rhythm is classified as nonshockable during adult cardiac
arrest?
A. Ventricular fibrillation
B. Pulseless ventricular tachycardia
C. Polymorphic ventricular tachycardia
D. Asystole
Answer: D. Asystole
Rationale: Asystole is a nonshockable rhythm. Management focuses on
high-quality CPR, epinephrine according to the cardiac-arrest
