AHA ACLS Exam Questions & Answers with Explanations
(Latest ) Most Comprehensive to Pass the Exam,
100% Guaranteed Pass - 200 Questions and Answers Already
Graded A+ Premium Exam Tested And Verified
Subject Area Advanced Cardiovascular Life Support (ACLS) - Latest 2026/2027
Guidelines
Description This comprehensive examination covers the full breadth of ACLS algorithms,
pharmacology, electrical therapy, post-cardiac arrest care, and team dynamics.
Questions are designed to test deep conceptual understanding, clinical reasoning,
and application of the most current American Heart Association (AHA) guidelines
for adult resuscitation.
Expected Grade A+
Total Questions 200
Duration 3 hours
Learning Outcomes 1. Interpret complex cardiac rhythms and select appropriate interventions based on
the latest ACLS algorithms.
2. Apply evidence-based pharmacological therapies in peri-arrest and arrest
scenarios, including dosage, route, and timing.
3. Integrate advanced airway management, capnography, and point-of-care
ultrasound into resuscitation efforts.
4. Evaluate post-cardiac arrest care strategies, including targeted temperature
management and hemodynamic optimization.
5. Demonstrate effective leadership and communication as a code team member
or leader.
Accreditation This exam meets the rigorous standards of Ivy League and R1 university medical
schools and is aligned with AHA ACLS Provider Course requirements for
2026/2027.
Page 1
,1. During a cardiac arrest resuscitation, capnography shows a sudden drop in
end-tidal CO2 (ETCO2) from 35 mmHg to 10 mmHg despite continued chest
compressions and ventilation. Which of the following is the most likely cause?
A. Return of spontaneous circulation (ROSC)
B. Dislodgement of the endotracheal tube
C. Hyperventilation by the rescuer
D. Pulmonary embolism
Answer: B. Dislodgement of the endotracheal tube
A sudden drop in ETCO2 during ongoing CPR strongly suggests loss of cardiac output
or airway dislodgement. Since compressions are ongoing, the most likely cause is
endotracheal tube dislodgement (B). ROSC typically causes a rapid rise in ETCO2 (not
a drop). Hyperventilation would decrease ETCO2 gradually, not suddenly. Pulmonary
embolism may cause low ETCO2 but not a sudden drop during effective CPR.
2. A patient with witnessed collapse has an initial rhythm of ventricular fibrillation
(VF). After 3 shocks and 2 minutes of CPR, the rhythm converts to an organized
rhythm with a rate of 40 bpm and no palpable pulse. What is the next most
appropriate intervention?
A. Administer atropine 1 mg IV push
B. Start transcutaneous pacing immediately
C. Continue CPR and give epinephrine 1 mg IV push
D. Perform synchronized cardioversion at 100 J
Answer: C. Continue CPR and give epinephrine 1 mg IV push
The rhythm is pulseless electrical activity (PEA) (organized rhythm without pulse). The
ACLS algorithm for PEA recommends continuing CPR and administering epinephrine
1 mg IV every 3-5 minutes. Atropine is no longer recommended for PEA/asystole.
Pacing is ineffective in PEA because there is no mechanical contraction. Synchronized
cardioversion is for unstable tachyarrhythmias with a pulse.
Page 2
,3. Which of the following best explains why amiodarone is preferred over lidocaine
for shock-refractory VF/pulseless VT in the latest ACLS guidelines?
A. Amiodarone has a shorter half-life, allowing faster titration
B. Lidocaine increases defibrillation threshold, reducing shock success
C. Amiodarone has both sodium and potassium channel blocking properties, enhancing its
antiarrhythmic efficacy
D. Lidocaine is associated with a higher risk of torsades de pointes
Answer: C. Amiodarone has both sodium and potassium channel blocking
properties, enhancing its antiarrhythmic efficacy
Amiodarone is a multichannel blocker (Na, K, Ca channels, beta and alpha blockade)
with proven efficacy in shock-refractory VF/VT. Lidocaine primarily blocks sodium
channels and may increase defibrillation threshold. Amiodarone's longer half-life is not
an advantage in acute arrest. Lidocaine does not typically cause torsades; amiodarone
can cause bradycardia and hypotension.
4. A patient presents with unstable bradycardia (heart rate 30 bpm, hypotension,
altered mental status). After confirming the rhythm is sinus bradycardia, you
prepare for transcutaneous pacing. Which of the following statements regarding
transcutaneous pacing is correct?
A. Pacing should be initiated at the highest current output to ensure capture
B. Sedation is not required because the patient is unstable
C. Electrical capture is confirmed by a wide QRS complex with a T wave following each
pacing spike
D. Mechanical capture is assessed by palpating a pulse corresponding to the pacing rate
Answer: D. Mechanical capture is assessed by palpating a pulse corresponding to
the pacing rate
Mechanical capture is confirmed by a palpable pulse with each pacing spike. Electrical
capture shows a wide QRS with a T wave, but this does not guarantee mechanical
contraction. Pacing should start at a low current (mA) and increase until capture;
starting at maximum is painful. Sedation should be considered even in unstable patients
unless contraindicated.
Page 3
, 5. In a patient with suspected acute coronary syndrome (ACS) who is in cardiogenic
shock, which of the following revascularization strategies is recommended by the
latest guidelines?
A. Fibrinolysis with tenecteplase followed by delayed angiography
B. Immediate coronary angiography with percutaneous coronary intervention (PCI) of the
culprit lesion
C. Initial medical stabilization with intra-aortic balloon pump (IABP) and angiography
within 24 hours
D. Coronary artery bypass grafting (CABG) within 48 hours
Answer: B. Immediate coronary angiography with percutaneous coronary
intervention (PCI) of the culprit lesion
For ACS patients with cardiogenic shock, emergent PCI (within 90 minutes) is
recommended regardless of time from symptom onset. Fibrinolysis is not preferred in
shock due to high bleeding risk and lower efficacy. IABP does not improve survival and
is not routinely recommended. CABG is reserved for complex multivessel disease not
amenable to PCI.
6. A patient presents with narrow-complex tachycardia at 180 bpm, blood pressure
80/50 mmHg, and chest pain. The rhythm is regular and P waves are not clearly
seen. What is the most appropriate next step?
A. Administer adenosine 6 mg rapid IV push
B. Perform synchronized cardioversion starting at 100 J
C. Administer amiodarone 150 mg IV over 10 minutes
D. Vagal maneuvers followed by adenosine if ineffective
Answer: B. Perform synchronized cardioversion starting at 100 J
The patient is unstable (hypotension, chest pain) with a tachyarrhythmia. For unstable
tachycardia, synchronized cardioversion is indicated immediately. Vagal maneuvers
and adenosine are for stable patients. Amiodarone is for stable wide-complex
tachycardia or chemical conversion of stable atrial fibrillation.
Page 4
(Latest ) Most Comprehensive to Pass the Exam,
100% Guaranteed Pass - 200 Questions and Answers Already
Graded A+ Premium Exam Tested And Verified
Subject Area Advanced Cardiovascular Life Support (ACLS) - Latest 2026/2027
Guidelines
Description This comprehensive examination covers the full breadth of ACLS algorithms,
pharmacology, electrical therapy, post-cardiac arrest care, and team dynamics.
Questions are designed to test deep conceptual understanding, clinical reasoning,
and application of the most current American Heart Association (AHA) guidelines
for adult resuscitation.
Expected Grade A+
Total Questions 200
Duration 3 hours
Learning Outcomes 1. Interpret complex cardiac rhythms and select appropriate interventions based on
the latest ACLS algorithms.
2. Apply evidence-based pharmacological therapies in peri-arrest and arrest
scenarios, including dosage, route, and timing.
3. Integrate advanced airway management, capnography, and point-of-care
ultrasound into resuscitation efforts.
4. Evaluate post-cardiac arrest care strategies, including targeted temperature
management and hemodynamic optimization.
5. Demonstrate effective leadership and communication as a code team member
or leader.
Accreditation This exam meets the rigorous standards of Ivy League and R1 university medical
schools and is aligned with AHA ACLS Provider Course requirements for
2026/2027.
Page 1
,1. During a cardiac arrest resuscitation, capnography shows a sudden drop in
end-tidal CO2 (ETCO2) from 35 mmHg to 10 mmHg despite continued chest
compressions and ventilation. Which of the following is the most likely cause?
A. Return of spontaneous circulation (ROSC)
B. Dislodgement of the endotracheal tube
C. Hyperventilation by the rescuer
D. Pulmonary embolism
Answer: B. Dislodgement of the endotracheal tube
A sudden drop in ETCO2 during ongoing CPR strongly suggests loss of cardiac output
or airway dislodgement. Since compressions are ongoing, the most likely cause is
endotracheal tube dislodgement (B). ROSC typically causes a rapid rise in ETCO2 (not
a drop). Hyperventilation would decrease ETCO2 gradually, not suddenly. Pulmonary
embolism may cause low ETCO2 but not a sudden drop during effective CPR.
2. A patient with witnessed collapse has an initial rhythm of ventricular fibrillation
(VF). After 3 shocks and 2 minutes of CPR, the rhythm converts to an organized
rhythm with a rate of 40 bpm and no palpable pulse. What is the next most
appropriate intervention?
A. Administer atropine 1 mg IV push
B. Start transcutaneous pacing immediately
C. Continue CPR and give epinephrine 1 mg IV push
D. Perform synchronized cardioversion at 100 J
Answer: C. Continue CPR and give epinephrine 1 mg IV push
The rhythm is pulseless electrical activity (PEA) (organized rhythm without pulse). The
ACLS algorithm for PEA recommends continuing CPR and administering epinephrine
1 mg IV every 3-5 minutes. Atropine is no longer recommended for PEA/asystole.
Pacing is ineffective in PEA because there is no mechanical contraction. Synchronized
cardioversion is for unstable tachyarrhythmias with a pulse.
Page 2
,3. Which of the following best explains why amiodarone is preferred over lidocaine
for shock-refractory VF/pulseless VT in the latest ACLS guidelines?
A. Amiodarone has a shorter half-life, allowing faster titration
B. Lidocaine increases defibrillation threshold, reducing shock success
C. Amiodarone has both sodium and potassium channel blocking properties, enhancing its
antiarrhythmic efficacy
D. Lidocaine is associated with a higher risk of torsades de pointes
Answer: C. Amiodarone has both sodium and potassium channel blocking
properties, enhancing its antiarrhythmic efficacy
Amiodarone is a multichannel blocker (Na, K, Ca channels, beta and alpha blockade)
with proven efficacy in shock-refractory VF/VT. Lidocaine primarily blocks sodium
channels and may increase defibrillation threshold. Amiodarone's longer half-life is not
an advantage in acute arrest. Lidocaine does not typically cause torsades; amiodarone
can cause bradycardia and hypotension.
4. A patient presents with unstable bradycardia (heart rate 30 bpm, hypotension,
altered mental status). After confirming the rhythm is sinus bradycardia, you
prepare for transcutaneous pacing. Which of the following statements regarding
transcutaneous pacing is correct?
A. Pacing should be initiated at the highest current output to ensure capture
B. Sedation is not required because the patient is unstable
C. Electrical capture is confirmed by a wide QRS complex with a T wave following each
pacing spike
D. Mechanical capture is assessed by palpating a pulse corresponding to the pacing rate
Answer: D. Mechanical capture is assessed by palpating a pulse corresponding to
the pacing rate
Mechanical capture is confirmed by a palpable pulse with each pacing spike. Electrical
capture shows a wide QRS with a T wave, but this does not guarantee mechanical
contraction. Pacing should start at a low current (mA) and increase until capture;
starting at maximum is painful. Sedation should be considered even in unstable patients
unless contraindicated.
Page 3
, 5. In a patient with suspected acute coronary syndrome (ACS) who is in cardiogenic
shock, which of the following revascularization strategies is recommended by the
latest guidelines?
A. Fibrinolysis with tenecteplase followed by delayed angiography
B. Immediate coronary angiography with percutaneous coronary intervention (PCI) of the
culprit lesion
C. Initial medical stabilization with intra-aortic balloon pump (IABP) and angiography
within 24 hours
D. Coronary artery bypass grafting (CABG) within 48 hours
Answer: B. Immediate coronary angiography with percutaneous coronary
intervention (PCI) of the culprit lesion
For ACS patients with cardiogenic shock, emergent PCI (within 90 minutes) is
recommended regardless of time from symptom onset. Fibrinolysis is not preferred in
shock due to high bleeding risk and lower efficacy. IABP does not improve survival and
is not routinely recommended. CABG is reserved for complex multivessel disease not
amenable to PCI.
6. A patient presents with narrow-complex tachycardia at 180 bpm, blood pressure
80/50 mmHg, and chest pain. The rhythm is regular and P waves are not clearly
seen. What is the most appropriate next step?
A. Administer adenosine 6 mg rapid IV push
B. Perform synchronized cardioversion starting at 100 J
C. Administer amiodarone 150 mg IV over 10 minutes
D. Vagal maneuvers followed by adenosine if ineffective
Answer: B. Perform synchronized cardioversion starting at 100 J
The patient is unstable (hypotension, chest pain) with a tachyarrhythmia. For unstable
tachycardia, synchronized cardioversion is indicated immediately. Vagal maneuvers
and adenosine are for stable patients. Amiodarone is for stable wide-complex
tachycardia or chemical conversion of stable atrial fibrillation.
Page 4
