PALS Exam Prep 2026 | Pediatric Emergency
Practice Questions & Verified Answers with
Detailed Rationales
SECTION 1 — PEDIATRIC ASSESSMENT & RECOGNITION
Questions 1–10
Question 1
A 4-year-old child presents with respiratory distress. Which finding is
the earliest and most sensitive indicator of impending respiratory failure
in this child?
A. Cyanosis
B. Altered mental status
C. Tachypnea
D. Bradycardia
Correct Answer: C. Tachypnea
Rationale Tachypnea is the earliest and most sensitive indicator of
respiratory distress in pediatric patients. Children have limited
respiratory reserve, and increased respiratory rate is the body's initial
compensatory mechanism to maintain adequate oxygenation and
ventilation. Cyanosis is a late and unreliable sign of hypoxemia, while
altered mental status and bradycardia are signs of impending respiratory
arrest, not early distress.
Why the other options are incorrect:
A. Cyanosis is a late sign of severe hypoxemia and may not be visible
until oxygen saturation is very low.
B. Altered mental status indicates significant hypoxemia or hypercarbia
and is a late finding.
C. Correct.
,D. Bradycardia in a child is an ominous sign of impending
cardiopulmonary arrest, not early respiratory distress.
Learning Objective: Identify early versus late signs of respiratory
distress in pediatric patients.
Difficulty: Easy
Question Type: Recall
Question 2
A healthcare provider is assessing a 6-month-old infant. Which finding
requires immediate intervention?
A. Respiratory rate of 40 breaths/min
B. Heart rate of 180 beats/min with poor feeding
C. Blood pressure of 85/50 mm Hg
D. Capillary refill of 2 seconds
Correct Answer: B. Heart rate of 180 beats/min with poor feeding
Rationale A heart rate of 180 beats/min in a 6-month-old infant is
tachycardic (normal range 100-160 beats/min for this age). When
combined with poor feeding, this suggests significant physiologic
compromise, possibly early shock or cardiac dysfunction. This finding
warrants immediate evaluation and intervention.
Why the other options are incorrect:
A. A respiratory rate of 40 is within normal limits for a 6-month-old (30-
60 breaths/min).
B. Correct.
C. Blood pressure of 85/50 mm Hg is within normal range for a 6-
month-old.
D. Capillary refill of 2 seconds is normal (≤2 seconds is acceptable).
Learning Objective: Recognize abnormal vital signs in infants requiring
intervention.
,Difficulty: Easy
Question Type: Application
Question 3
Which statement about pediatric cardiac arrest is correct?
A. Ventricular fibrillation is the most common initial rhythm in pediatric
cardiac arrest
B. Respiratory failure is the most common cause of pediatric cardiac
arrest
C. Most pediatric cardiac arrests occur in children with structurally
normal hearts
D. Defibrillation is rarely needed in pediatric resuscitation
Correct Answer: B. Respiratory failure is the most common cause of
pediatric cardiac arrest
Rationale Unlike adults, where sudden cardiac arrest from ventricular
fibrillation is common, pediatric cardiac arrest is most often the result of
progressive respiratory failure or shock leading to hypoxemic
bradycardia and eventual asystole. This underscores the importance of
early respiratory support and prevention of arrest.
Why the other options are incorrect:
A. Ventricular fibrillation is less common in children; bradycardia,
asystole, or pulseless electrical activity are more typical initial rhythms.
B. Correct.
C. Many pediatric cardiac arrests occur in children with underlying
congenital heart disease or chronic conditions, but the trigger is often
respiratory.
D. Defibrillation is needed for shockable rhythms (VF/pulseless VT),
though less common in children than adults.
Learning Objective: Describe the most common pathway to pediatric
cardiac arrest.
, Difficulty: Moderate
Question Type: Recall
Question 4
A 3-year-old child has a heart rate of 55 beats/min and is lethargic. What
is the immediate priority?
A. Administer atropine
B. Start chest compressions
C. Establish vascular access
D. Obtain a 12-lead ECG
Correct Answer: B. Start chest compressions
Rationale In a child, bradycardia with signs of poor perfusion (lethargy,
hypotension, weak pulses) that does not respond to oxygenation and
ventilation requires immediate chest compressions. PALS guidelines
specify that if heart rate is <60 beats/min with signs of poor perfusion
despite adequate oxygenation and ventilation, CPR should be initiated.
Why the other options are incorrect:
A. Atropine may be considered for vagal-mediated bradycardia or AV
block, but compressions are the priority in a symptomatic, bradycardic
child.
B. Correct.
C. Vascular access is important but compressions take priority.
D. ECG may help identify the rhythm but should not delay CPR.
Learning Objective: Apply PALS guidelines for bradycardia with poor
perfusion.
Difficulty: Moderate
Question Type: Clinical Judgment
Question 5
A child presents with a 2-day history of vomiting and diarrhea. Which
Practice Questions & Verified Answers with
Detailed Rationales
SECTION 1 — PEDIATRIC ASSESSMENT & RECOGNITION
Questions 1–10
Question 1
A 4-year-old child presents with respiratory distress. Which finding is
the earliest and most sensitive indicator of impending respiratory failure
in this child?
A. Cyanosis
B. Altered mental status
C. Tachypnea
D. Bradycardia
Correct Answer: C. Tachypnea
Rationale Tachypnea is the earliest and most sensitive indicator of
respiratory distress in pediatric patients. Children have limited
respiratory reserve, and increased respiratory rate is the body's initial
compensatory mechanism to maintain adequate oxygenation and
ventilation. Cyanosis is a late and unreliable sign of hypoxemia, while
altered mental status and bradycardia are signs of impending respiratory
arrest, not early distress.
Why the other options are incorrect:
A. Cyanosis is a late sign of severe hypoxemia and may not be visible
until oxygen saturation is very low.
B. Altered mental status indicates significant hypoxemia or hypercarbia
and is a late finding.
C. Correct.
,D. Bradycardia in a child is an ominous sign of impending
cardiopulmonary arrest, not early respiratory distress.
Learning Objective: Identify early versus late signs of respiratory
distress in pediatric patients.
Difficulty: Easy
Question Type: Recall
Question 2
A healthcare provider is assessing a 6-month-old infant. Which finding
requires immediate intervention?
A. Respiratory rate of 40 breaths/min
B. Heart rate of 180 beats/min with poor feeding
C. Blood pressure of 85/50 mm Hg
D. Capillary refill of 2 seconds
Correct Answer: B. Heart rate of 180 beats/min with poor feeding
Rationale A heart rate of 180 beats/min in a 6-month-old infant is
tachycardic (normal range 100-160 beats/min for this age). When
combined with poor feeding, this suggests significant physiologic
compromise, possibly early shock or cardiac dysfunction. This finding
warrants immediate evaluation and intervention.
Why the other options are incorrect:
A. A respiratory rate of 40 is within normal limits for a 6-month-old (30-
60 breaths/min).
B. Correct.
C. Blood pressure of 85/50 mm Hg is within normal range for a 6-
month-old.
D. Capillary refill of 2 seconds is normal (≤2 seconds is acceptable).
Learning Objective: Recognize abnormal vital signs in infants requiring
intervention.
,Difficulty: Easy
Question Type: Application
Question 3
Which statement about pediatric cardiac arrest is correct?
A. Ventricular fibrillation is the most common initial rhythm in pediatric
cardiac arrest
B. Respiratory failure is the most common cause of pediatric cardiac
arrest
C. Most pediatric cardiac arrests occur in children with structurally
normal hearts
D. Defibrillation is rarely needed in pediatric resuscitation
Correct Answer: B. Respiratory failure is the most common cause of
pediatric cardiac arrest
Rationale Unlike adults, where sudden cardiac arrest from ventricular
fibrillation is common, pediatric cardiac arrest is most often the result of
progressive respiratory failure or shock leading to hypoxemic
bradycardia and eventual asystole. This underscores the importance of
early respiratory support and prevention of arrest.
Why the other options are incorrect:
A. Ventricular fibrillation is less common in children; bradycardia,
asystole, or pulseless electrical activity are more typical initial rhythms.
B. Correct.
C. Many pediatric cardiac arrests occur in children with underlying
congenital heart disease or chronic conditions, but the trigger is often
respiratory.
D. Defibrillation is needed for shockable rhythms (VF/pulseless VT),
though less common in children than adults.
Learning Objective: Describe the most common pathway to pediatric
cardiac arrest.
, Difficulty: Moderate
Question Type: Recall
Question 4
A 3-year-old child has a heart rate of 55 beats/min and is lethargic. What
is the immediate priority?
A. Administer atropine
B. Start chest compressions
C. Establish vascular access
D. Obtain a 12-lead ECG
Correct Answer: B. Start chest compressions
Rationale In a child, bradycardia with signs of poor perfusion (lethargy,
hypotension, weak pulses) that does not respond to oxygenation and
ventilation requires immediate chest compressions. PALS guidelines
specify that if heart rate is <60 beats/min with signs of poor perfusion
despite adequate oxygenation and ventilation, CPR should be initiated.
Why the other options are incorrect:
A. Atropine may be considered for vagal-mediated bradycardia or AV
block, but compressions are the priority in a symptomatic, bradycardic
child.
B. Correct.
C. Vascular access is important but compressions take priority.
D. ECG may help identify the rhythm but should not delay CPR.
Learning Objective: Apply PALS guidelines for bradycardia with poor
perfusion.
Difficulty: Moderate
Question Type: Clinical Judgment
Question 5
A child presents with a 2-day history of vomiting and diarrhea. Which
