AAERT CDR MAIN EXAM 2026 – UPDATED
TEST QUESTIONS & VERIFIED ANSWERS |
CDR EXAM PREP STUDY GUIDE
AAERT CDR MAIN EXAM 2026 – UPDATED TEST QUESTIONS & VERIFIED
ANSWERS
DOCUMENT OVERVIEW
• This comprehensive study guide contains verified examination questions designed
to assess mastery of Cardiac Defibrillation and Resuscitation protocols, emergency
response procedures, and advanced clinical decision-making across all major CDR
domains.
• Study efficiently by working through questions systematically, using detailed
rationales to reinforce concepts; review incorrect answers multiple times, and
group related questions by topic to identify knowledge gaps before the actual
examination.
QUESTIONS & ANSWERS
1. What is the primary purpose of early defibrillation in cardiac arrest
management?
A) To increase blood pressure immediately
B) To restore normal cardiac rhythm in ventricular fibrillation
C) To suppress bradycardia
D) To reduce patient anxiety
E) To prevent aspiration
B) To restore normal cardiac rhythm in ventricular fibrillation
Rationale: Early defibrillation is the definitive treatment for ventricular fibrillation
(VF) and pulseless ventricular tachycardia (VT). Defibrillation works by delivering an
electric shock that depolarizes the entire myocardium simultaneously, interrupting
the chaotic electrical activity of VF and allowing the heart's natural pacemaker to
,reestablish an organized rhythm. Early application of defibrillation significantly
improves survival rates and neurological outcomes. The other options are either
consequences of successful resuscitation or unrelated to defibrillation's primary
mechanism.
2. Which arrhythmia is most commonly associated with sudden cardiac death
in adults?
A) Atrial fibrillation
B) Bradycardia
C) Ventricular fibrillation
D) Atrial flutter
E) Sinus tachycardia
C) Ventricular fibrillation
Rationale: Ventricular fibrillation represents the most common initial rhythm in
witnessed out-of-hospital cardiac arrest in adults. It is characterized by completely
disorganized electrical activity of the ventricles, resulting in no effective cardiac
output. VF is immediately life-threatening and requires urgent defibrillation. While
atrial fibrillation can be serious, it may be tolerated for short periods; VF is
uniformly fatal within minutes if untreated. The prognosis of VF improves
substantially with early CPR and defibrillation, making it the most critical arrhythmia
requiring immediate intervention.
3. What is the recommended compression-to-ventilation ratio for single-
rescuer CPR in adults?
A) 30:2
B) 15:2
C) 100:2
D) 50:1
,E) 40:4
A) 30:2
Rationale: The current American Heart Association guidelines recommend a
compression-to-ventilation ratio of 30:2 for adult single-rescuer CPR. This ratio (30
chest compressions followed by 2 rescue breaths) has been shown to optimize
perfusion pressure and oxygenation. Recent research indicates that minimizing
interruptions in chest compressions improves survival outcomes, which is why the
current emphasis is on high-quality compressions with adequate depth (at least 2
inches), rate (100–120 compressions per minute), and allowing full recoil. The 30:2
ratio balances these goals effectively.
4. Which medication is the first-line vasopressor administered during cardiac
arrest?
A) Dopamine
B) Epinephrine (Adrenaline)
C) Norepinephrine
D) Amiodarone
E) Lidocaine
B) Epinephrine (Adrenaline)
Rationale: Epinephrine is the first-line vasopressor recommended during cardiac
arrest. It is administered intravenously or intraosseously at a dose of 1 mg every 3–
5 minutes during resuscitation. Epinephrine's alpha-adrenergic effects increase
peripheral vascular resistance, thereby improving coronary and cerebral perfusion
pressure—a critical factor for resuming spontaneous circulation (ROSC) and
protecting the brain. Dopamine and norepinephrine are second-line agents.
Amiodarone and lidocaine are antiarrhythmics, not primary vasopressors, and are
given for specific arrhythmias after epinephrine has been administered.
, 5. At what chest compression rate should CPR be performed to meet current
guidelines?
A) 60–80 compressions per minute
B) 80–100 compressions per minute
C) 100–120 compressions per minute
D) 120–140 compressions per minute
E) 140–160 compressions per minute
C) 100–120 compressions per minute
Rationale: Current guidelines recommend chest compressions at a rate of 100–120
compressions per minute (consistent with the rhythm of the Bee Gees' "Stayin'
Alive"). This rate optimizes cardiac output and cerebral perfusion during cardiac
arrest. Rates below 100/min are insufficient to generate adequate perfusion, while
rates exceeding 120/min reduce compression depth and allow inadequate chest
recoil, both of which worsen outcomes. Studies have shown that maintaining this
specific rate range produces the best survival and neurological outcomes in cardiac
arrest patients.
6. What is the maximum interval that chest compressions should be
interrupted for defibrillation?
A) 5 seconds
B) 10 seconds
C) 15 seconds
D) 20 seconds
E) 30 seconds
B) 10 seconds
Rationale: Chest compressions should be interrupted for no more than 10 seconds
when applying defibrillation pads or delivering a shock. Minimizing interruptions in
TEST QUESTIONS & VERIFIED ANSWERS |
CDR EXAM PREP STUDY GUIDE
AAERT CDR MAIN EXAM 2026 – UPDATED TEST QUESTIONS & VERIFIED
ANSWERS
DOCUMENT OVERVIEW
• This comprehensive study guide contains verified examination questions designed
to assess mastery of Cardiac Defibrillation and Resuscitation protocols, emergency
response procedures, and advanced clinical decision-making across all major CDR
domains.
• Study efficiently by working through questions systematically, using detailed
rationales to reinforce concepts; review incorrect answers multiple times, and
group related questions by topic to identify knowledge gaps before the actual
examination.
QUESTIONS & ANSWERS
1. What is the primary purpose of early defibrillation in cardiac arrest
management?
A) To increase blood pressure immediately
B) To restore normal cardiac rhythm in ventricular fibrillation
C) To suppress bradycardia
D) To reduce patient anxiety
E) To prevent aspiration
B) To restore normal cardiac rhythm in ventricular fibrillation
Rationale: Early defibrillation is the definitive treatment for ventricular fibrillation
(VF) and pulseless ventricular tachycardia (VT). Defibrillation works by delivering an
electric shock that depolarizes the entire myocardium simultaneously, interrupting
the chaotic electrical activity of VF and allowing the heart's natural pacemaker to
,reestablish an organized rhythm. Early application of defibrillation significantly
improves survival rates and neurological outcomes. The other options are either
consequences of successful resuscitation or unrelated to defibrillation's primary
mechanism.
2. Which arrhythmia is most commonly associated with sudden cardiac death
in adults?
A) Atrial fibrillation
B) Bradycardia
C) Ventricular fibrillation
D) Atrial flutter
E) Sinus tachycardia
C) Ventricular fibrillation
Rationale: Ventricular fibrillation represents the most common initial rhythm in
witnessed out-of-hospital cardiac arrest in adults. It is characterized by completely
disorganized electrical activity of the ventricles, resulting in no effective cardiac
output. VF is immediately life-threatening and requires urgent defibrillation. While
atrial fibrillation can be serious, it may be tolerated for short periods; VF is
uniformly fatal within minutes if untreated. The prognosis of VF improves
substantially with early CPR and defibrillation, making it the most critical arrhythmia
requiring immediate intervention.
3. What is the recommended compression-to-ventilation ratio for single-
rescuer CPR in adults?
A) 30:2
B) 15:2
C) 100:2
D) 50:1
,E) 40:4
A) 30:2
Rationale: The current American Heart Association guidelines recommend a
compression-to-ventilation ratio of 30:2 for adult single-rescuer CPR. This ratio (30
chest compressions followed by 2 rescue breaths) has been shown to optimize
perfusion pressure and oxygenation. Recent research indicates that minimizing
interruptions in chest compressions improves survival outcomes, which is why the
current emphasis is on high-quality compressions with adequate depth (at least 2
inches), rate (100–120 compressions per minute), and allowing full recoil. The 30:2
ratio balances these goals effectively.
4. Which medication is the first-line vasopressor administered during cardiac
arrest?
A) Dopamine
B) Epinephrine (Adrenaline)
C) Norepinephrine
D) Amiodarone
E) Lidocaine
B) Epinephrine (Adrenaline)
Rationale: Epinephrine is the first-line vasopressor recommended during cardiac
arrest. It is administered intravenously or intraosseously at a dose of 1 mg every 3–
5 minutes during resuscitation. Epinephrine's alpha-adrenergic effects increase
peripheral vascular resistance, thereby improving coronary and cerebral perfusion
pressure—a critical factor for resuming spontaneous circulation (ROSC) and
protecting the brain. Dopamine and norepinephrine are second-line agents.
Amiodarone and lidocaine are antiarrhythmics, not primary vasopressors, and are
given for specific arrhythmias after epinephrine has been administered.
, 5. At what chest compression rate should CPR be performed to meet current
guidelines?
A) 60–80 compressions per minute
B) 80–100 compressions per minute
C) 100–120 compressions per minute
D) 120–140 compressions per minute
E) 140–160 compressions per minute
C) 100–120 compressions per minute
Rationale: Current guidelines recommend chest compressions at a rate of 100–120
compressions per minute (consistent with the rhythm of the Bee Gees' "Stayin'
Alive"). This rate optimizes cardiac output and cerebral perfusion during cardiac
arrest. Rates below 100/min are insufficient to generate adequate perfusion, while
rates exceeding 120/min reduce compression depth and allow inadequate chest
recoil, both of which worsen outcomes. Studies have shown that maintaining this
specific rate range produces the best survival and neurological outcomes in cardiac
arrest patients.
6. What is the maximum interval that chest compressions should be
interrupted for defibrillation?
A) 5 seconds
B) 10 seconds
C) 15 seconds
D) 20 seconds
E) 30 seconds
B) 10 seconds
Rationale: Chest compressions should be interrupted for no more than 10 seconds
when applying defibrillation pads or delivering a shock. Minimizing interruptions in
