Pass Your Certification With This Comprehensive ACLS Sample Test

Advanced Cardiovascular Life Support (ACLS) certification is a pivotal milestone for healthcare providers working in emergency, critical care, and perioperative settings. The exam is designed not just to test memorization, but to evaluate clinical judgment, rapid decision-making, and the ability to lead a resuscitation team under extreme pressure. Utilizing a high-quality sample test is one of the most effective ways to bridge the gap between theoretical knowledge and real-world application.

This comprehensive guide provides a structured sample test environment, focusing on the latest American Heart Association (AHA) guidelines. By engaging with these scenarios and their detailed rationales, providers can identify knowledge gaps in rhythm recognition, pharmacology, and resuscitation algorithms.

Essential Components of the ACLS Curriculum

Before diving into the sample questions, it is critical to understand the four pillars upon which the ACLS exam is built. Success requires mastery of these areas to ensure that interventions are both timely and accurate.

Life-Threatening Rhythm Recognition

Identifying cardiac rhythms on an ECG monitor is the first step in any ACLS algorithm. Candidates must distinguish between shockable rhythms (Ventricular Fibrillation and Pulseless Ventricular Tachycardia) and non-shockable rhythms (Asystole and Pulseless Electrical Activity). Furthermore, the ability to recognize symptomatic bradycardias and stable versus unstable tachycardias dictates the subsequent pharmacological and electrical interventions.

Pharmacology and Administration

Knowing the correct medication is only half the battle; understanding the dosage, frequency, and administration technique is vital. Key medications include:

Epinephrine: The primary vasopressor used in cardiac arrest.
Amiodarone and Lidocaine: Antiarrhythmic agents used for refractory VF/pVT.
Adenosine: Used for narrow-complex supraventricular tachycardia (SVT).
Atropine: The first-line treatment for symptomatic bradycardia.
Dopamine and Norepinephrine: Used for post-ROSC (Return of Spontaneous Circulation) hypotension management.

Resuscitation Algorithms

The ACLS algorithms act as a roadmap for care. Whether managing an Acute Coronary Syndrome (ACS) patient or a suspected stroke, following the systematic "A-B-C-D" (Airway, Breathing, Circulation, Differential Diagnosis) survey ensures that reversible causes are addressed and life-saving steps are not skipped.

The Human Element: Team Dynamics

Medical errors in high-stress environments often stem from poor communication rather than a lack of medical knowledge. The exam evaluates concepts like closed-loop communication, clear roles and responsibilities, and knowing one's limitations. A successful ACLS provider knows how to lead a team while encouraging constructive intervention from team members.

ACLS Sample Test Questions

The following questions reflect the difficulty and scope of the actual certification exam. Select the best answer for each scenario.

Section 1: Cardiac Arrest and Algorithms

A 65-year-old male collapses in the hospital lobby. You arrive with the crash cart and find the patient unresponsive and pulseless. The monitor shows Ventricular Fibrillation (VF). What is the first priority? A. Administer 1 mg of Epinephrine IV. B. Perform an immediate synchronized cardioversion at 100J. C. Deliver a single unsynchronized shock at the manufacturer’s recommended energy level. D. Intubate the patient to secure the airway before defibrillation.
During a resuscitation attempt, the rhythm changes from Ventricular Fibrillation to Asystole. Which of the following is the most appropriate next step? A. Deliver a shock at 360J (monophasic). B. Check the rhythm in a second lead to confirm asystole. C. Administer Amiodarone 300 mg IV push. D. Increase the rate of ventilations to 20 breaths per minute.
A patient has been in Pulseless Electrical Activity (PEA) for three cycles of CPR. You have administered two doses of Epinephrine. The PETCO2 reading is consistently 8 mmHg. What does this indicate? A. The patient has achieved ROSC. B. CPR quality is likely inadequate. C. The patient is hyperventilating. D. The endotracheal tube is correctly placed.
Which of the following describes the correct administration of Amiodarone for a patient in refractory Ventricular Fibrillation? A. 150 mg IV bolus, followed by 300 mg if the rhythm persists. B. 300 mg IV bolus, followed by a second dose of 150 mg after 3–5 minutes. C. 1 mg/kg IV bolus every 3 minutes. D. 6 mg rapid IV push followed by a 20 mL saline flush.
A team is treating a patient in cardiac arrest. The team leader assigns roles but two members are attempting to perform the same task (compressions). Which element of team dynamics is lacking? A. Closed-loop communication. B. Mutual respect. C. Clear roles and responsibilities. D. Knowledge sharing.

Section 2: Tachycardia and Bradycardia

A 54-year-old female presents with a heart rate of 190 bpm. She is alert but complains of severe chest pain and has a blood pressure of 82/40 mmHg. The monitor shows a regular, narrow-complex tachycardia. What is the immediate treatment? A. Vagal maneuvers. B. Adenosine 6 mg rapid IV push. C. Synchronized cardioversion. D. Diltiazem 0.25 mg/kg IV over 2 minutes.
A patient presents with symptomatic bradycardia (HR 38 bpm) and signs of shock. Atropine 1 mg was administered with no improvement. What is the next recommended intervention? A. Repeat Atropine 1 mg every minute until a max of 6 mg. B. Transcutaneous pacing (TCP). C. Synchronized cardioversion at 50J. D. Administration of Lidocaine 1–1.5 mg/kg.
In the setting of stable SVT, if Vagal maneuvers fail, what is the initial dose of Adenosine? A. 3 mg. B. 6 mg. C. 12 mg. D. 20 mg.
When performing synchronized cardioversion, why is the "Sync" mode critical? A. It ensures the shock is delivered during the P wave. B. It prevents the delivery of a shock during the vulnerable period of the T wave. C. It allows for higher energy levels to be used safely. D. It automatically identifies the R-R interval for pacing.
A patient has a heart rate of 140 bpm, is stable, and the ECG shows a wide-complex tachycardia with a regular rhythm. What is the most appropriate first-line medication? A. Atropine. B. Adenosine (if regular and monomorphic). C. Epinephrine. D. Magnesium Sulfate.

Section 3: Post-Cardiac Arrest and Special Scenarios

After achieving ROSC, a patient remains comatose. What is the target temperature for Targeted Temperature Management (TTM)? A. 30°C to 32°C. B. 32°C to 36°C. C. 36.5°C to 37.5°C. D. 38°C.
A post-ROSC patient has a blood pressure of 80/45 mmHg. Which of the following is a recommended initial intervention? A. 1–2 Liters of isotonic crystalloid (e.g., Normal Saline). B. Immediate administration of Amiodarone 150 mg. C. Start a Nitroprusside drip at 0.5 mcg/kg/min. D. High-dose Aspirin.
What is the primary goal of the "Differential Diagnosis" step in the ACLS Survey? A. To determine the patient's insurance status. B. To identify and treat reversible causes of the arrest (H's and T's). C. To decide which family member to call first. D. To assign a permanent diagnosis for the medical record.
A patient with a suspected stroke arrives at the ED. What is the goal time for the completion of a non-contrast CT scan of the head from the time of arrival? A. 10 minutes. B. 20 minutes. C. 45 minutes. D. 60 minutes.
During CPR, an advanced airway is placed. What is the correct ventilation rate? A. 1 breath every 6 seconds (10 breaths/min) with continuous compressions. B. 2 breaths after every 30 compressions. C. 1 breath every 3 seconds (20 breaths/min). D. 10 breaths every 30 seconds.

Detailed Answer Key and Clinical Rationales

Success in ACLS is not about picking the right letter; it is about understanding the pathophysiology and the "why" behind every action. Below are the rationales for the sample test.

1. Answer: C (Deliver a single unsynchronized shock)

Rationale: In a witnessed cardiac arrest where the rhythm is Ventricular Fibrillation (VF), the highest priority is defibrillation. Every minute that passes without a shock reduces the chance of survival by 7–10%. Unsynchronized shocks are used for pulseless rhythms like VF or pulseless VT. Epinephrine is administered only after the second shock, and intubation should not delay the initial defibrillation.

2. Answer: B (Check the rhythm in a second lead)

Rationale: Asystole is a "terminal" rhythm, but it can be mimicked by a loose lead, low signal gain, or an incorrect monitor setting. Before proceeding with the Asystole algorithm (which involves Epinephrine and checking for reversible causes), a provider must confirm the rhythm in two perpendicular leads. Delivering a shock (A) is contraindicated in asystole as there is no electrical activity to reset.

3. Answer: B (CPR quality is likely inadequate)

Rationale: Quantitative Waveform Capnography (PETCO2) is a direct reflection of cardiac output during CPR. A PETCO2 of less than 10 mmHg indicates poor perfusion, often due to shallow compressions, an inadequate rate, or excessive interruptions. If PETCO2 is low, the team leader should coach the compressor to improve depth and recoil. A sudden increase to 35–45 mmHg typically indicates ROSC.

4. Answer: B (300 mg IV bolus, followed by 150 mg)

Rationale: The ACLS protocol for refractory VF/pVT (rhythms that persist after at least two shocks and one dose of Epinephrine) allows for Amiodarone. The first dose is a 300 mg rapid bolus. The second dose, if needed, is 150 mg. Option D (6 mg Adenosine) is used for SVT, not cardiac arrest. Option C is the dosing for Lidocaine (1–1.5 mg/kg), which is also an acceptable alternative to Amiodarone.

5. Answer: C (Clear roles and responsibilities)

Rationale: In high-performing teams, the Team Leader clearly defines roles (e.g., "John, you are on compressions; Sarah, you are on the airway"). When roles are not clearly assigned or understood, tasks may be duplicated or neglected, leading to inefficiency and potential harm to the patient.

6. Answer: C (Synchronized cardioversion)

Rationale: This is a classic "unstable tachycardia" scenario. The patient has signs of hemodynamic instability: severe chest pain and hypotension (BP 82/40). According to the Adult Tachycardia with a Pulse Algorithm, unstable patients require immediate synchronized cardioversion. Vagal maneuvers and Adenosine are reserved for stable patients.

7. Answer: B (Transcutaneous pacing)

Rationale: If Atropine is ineffective in treating symptomatic, unstable bradycardia, the provider must move quickly to the next tier of interventions: transcutaneous pacing (TCP) or a chronotropic infusion (Dopamine or Epinephrine). Repeating Atropine beyond the maximum dose of 3 mg (AHA 2020) is not recommended.

8. Answer: B (6 mg)

Rationale: For stable narrow-complex SVT, the first dose of Adenosine is 6 mg given as a rapid IV push, followed by a 20 mL saline flush. If the first dose does not convert the rhythm within 1–2 minutes, a second dose of 12 mg is administered. Providers should warn the patient that they may feel a "thump" in their chest or a sense of impending doom during the transient pause.

9. Answer: B (Prevents shock during the T wave)

Rationale: The R-on-T phenomenon can trigger Ventricular Fibrillation if a shock is delivered during the heart's relative refractory period (the T wave). Synchronized cardioversion uses the monitor to track the R-wave and delivers the shock precisely at the peak of the R-wave, avoiding the T-wave.

10. Answer: B (Adenosine)

Rationale: While wide-complex tachycardia is often Ventricular Tachycardia, the 2020 guidelines allow for the use of Adenosine if the rhythm is regular and monomorphic. It serves as both a diagnostic and therapeutic tool. However, if the patient becomes unstable, immediate cardioversion is required.

11. Answer: B (32°C to 36°C)

Rationale: Targeted Temperature Management is the only intervention proven to improve neurological outcomes in patients who remain comatose after ROSC. The recommended range is 32°C to 36°C for a duration of at least 24 hours.

12. Answer: A (1–2 Liters of isotonic crystalloid)

Rationale: Hypotension is common after ROSC. The first step in the ACLS Post-Cardiac Arrest Care Algorithm is to address fluid volume. If the patient is not fluid-overloaded, a 1–2 L bolus of Normal Saline or Lactated Ringer's is the initial treatment. If fluids do not stabilize the BP, vasopressors (Dopamine, Epinephrine, or Norepinephrine) should be started.

13. Answer: B (Identify and treat reversible causes)

Rationale: Cardiac arrest is a symptom of an underlying problem. The "H's and T's" (Hypovolemia, Hypoxia, Hydrogen ion, Hypo/Hyperkalemia, Hypothermia; Tension pneumothorax, Tamponade, Toxins, Thrombosis-Pulmonary, Thrombosis-Coronary) represent the most common causes. If these are not identified and reversed, the patient is unlikely to survive despite perfect CPR.

14. Answer: B (20 minutes)

Rationale: In the setting of a suspected acute ischemic stroke, "Time is Brain." The goal is for the non-contrast CT scan to be completed within 20 minutes of the patient's arrival at the ED, and interpreted within 45 minutes to determine if fibrinolytic therapy is appropriate.

15. Answer: A (1 breath every 6 seconds)

Rationale: Once an advanced airway (Endotracheal tube or Supraglottic airway) is in place, the ratio of 30:2 is no longer used. Instead, one rescuer provides continuous chest compressions at 100–120 bpm, and another rescuer provides 1 breath every 6 seconds. Excessive ventilation (hyperventilation) must be avoided as it increases intrathoracic pressure and decreases venous return to the heart.

Strategic Tips for Passing the ACLS Exam

Many providers fail the ACLS exam not because they lack medical knowledge, but because they struggle with test-taking logic or rhythm interpretation under time constraints. These strategies can help.

Master the "H's and T's"

Memorizing this list is non-negotiable. During the exam and the mega-code skills station, if the patient is not responding to standard ACLS care (CPR, shocks, Epi), the team leader should look at the team and ask, "What are our H's and T's?" In a test scenario, if a patient is pulseless and has a history of trauma, think Hypovolemia or Tension Pneumothorax. If they have renal failure, think Hyperkalemia.

The Power of Elimination in Rhythm Recognition

When looking at an ECG strip:

Is it fast or slow? (>100 bpm or <60 bpm).
Is it regular or irregular?
Is the QRS narrow or wide? (Narrow <0.12s indicates an atrial origin; Wide >0.12s indicates a ventricular origin or aberrancy).
Are there P-waves? By answering these four questions, you can eliminate 75% of the wrong answers immediately.

Understanding Synchronization vs. Defibrillation

This is a frequent point of confusion.

Defibrillation: High energy, unsynchronized. Used for Pulseless rhythms (VF/pVT).
Synchronized Cardioversion: Lower energy, timed with the R-wave. Used for Unstable patients with a pulse (SVT, AFib with RVR, Monomorphic VT with a pulse). Remember: No pulse = No sync.

Focus on High-Quality CPR

The AHA emphasizes that drugs and advanced airways are secondary to high-quality chest compressions. In any test question, if "Push hard and fast" or "Minimize interruptions" is an option alongside a drug dose, carefully evaluate the timing. Compressions should only be interrupted for rhythm checks (maximum 10 seconds) and shock delivery.

Summary of ACLS Test Priorities

The ACLS sample test reveals that successful resuscitation relies on a hierarchy of interventions. At the base of the pyramid is High-Quality CPR and Defibrillation. The middle layer consists of Algorithm Adherence and Pharmacology. The apex is the Differential Diagnosis (H's and T's) and Post-ROSC Care.

When taking your sample test, do not just memorize the answers. Instead, visualize yourself in a resuscitation room. Hear the beep of the monitor, feel the rhythm of the compressions, and practice the verbal commands used in closed-loop communication. This mental rehearsal, combined with rigorous practice, will ensure you not only pass the ACLS exam but also become a more effective life-saver in your clinical practice.

Frequently Asked Questions (FAQ)

What is the passing score for the ACLS written exam?

The AHA usually requires a score of 84% or higher to pass the written portion of the ACLS certification. This means you can typically only miss about 8 questions out of 50.

How often do ACLS guidelines change?

The American Heart Association and ILCOR update the guidelines every five years. The most recent major update was in 2020, with focused updates provided annually or biennially as new evidence emerges. Ensure your study materials are marked for 2020–2025.

Is Lidocaine or Amiodarone preferred for VF/pVT?

Current guidelines state that both are equally acceptable. While Amiodarone was favored for many years, recent studies have shown Lidocaine to be equally effective in achieving ROSC in refractory shockable rhythms.

What should I do if I fail the ACLS skills station?

Most instructors allow for a "re-test" or remediation on the same day. The instructor will point out the specific error (e.g., failure to recognize a rhythm or incorrect drug dose). Listen to the feedback, take a breath, and re-run the scenario focusing on that specific area.

Can I use a cheat sheet during the exam?

No, the official AHA exam is closed-book. However, you are expected to use the algorithms during the hands-on "Mega-Code" portion of the class. The goal is to ensure you know where to find the information even if you don't have it all memorized.