PALS Pre-Test Exam Questions with 100% Correct
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Pediatric Emergency & PALS — Q&A With Rationales
1. ECG shows second-degree AV block in a 12-year-old
Answer: Second-degree atrioventricular (AV) block
Rationale: Second-degree AV block is characterized by intermittent failure of atrial impulses to
conduct to the ventricles, producing dropped QRS complexes.
2. Best lab test to assess adequacy of oxygen delivery
Answer: Lactate
Rationale: Elevated lactate indicates anaerobic metabolism due to inadequate tissue oxygen
delivery and perfusion.
3. Decreased breath sounds, bradycardia, hypoxia
Answer: Respiratory failure
Rationale: Hypoventilation with hypoxia and bradycardia indicates failure of oxygenation and
ventilation.
4. Gasping respirations, pulse 65 bpm
Answer: Deliver BVM ventilation every 3–5 seconds
Rationale: Bradycardia with poor respirations requires immediate ventilation before chest
compressions.
, 5. Lyme disease with prolonged PR interval
Answer: First-degree AV block
Rationale: Lyme carditis commonly causes conduction delays, especially first-degree AV block.
6. Signs of post–cardiac arrest syndrome
Answer: Hypotension, fever, hyperglycemia
Rationale: PCAS reflects systemic ischemia-reperfusion injury affecting multiple organ systems.
7. High-quality CPR actions
Answers:
• Full chest recoil
• Ventilations lasting ~1 second
• Compression depth ~2 inches
• 15:2 ratio (two rescuers)
Rationale: These actions optimize coronary and cerebral perfusion.
8. Shockable rhythms
Answer: Ventricular fibrillation (VF) and pulseless VT
Rationale: These rhythms respond to defibrillation.
9. Hypotension vs shock
Answer: Hypotension is not a consistent feature of shock
Rationale: Children compensate well; hypotension is a late and ominous sign.
10. Target oxygen saturation
Answer: Above 94%
Rationale: Adequate oxygenation reduces hypoxic injury.
Answers (Graded A+) Guaranteed >>Brandnew<<
Update By Acemarket Download Now For Better
Revision
Pediatric Emergency & PALS — Q&A With Rationales
1. ECG shows second-degree AV block in a 12-year-old
Answer: Second-degree atrioventricular (AV) block
Rationale: Second-degree AV block is characterized by intermittent failure of atrial impulses to
conduct to the ventricles, producing dropped QRS complexes.
2. Best lab test to assess adequacy of oxygen delivery
Answer: Lactate
Rationale: Elevated lactate indicates anaerobic metabolism due to inadequate tissue oxygen
delivery and perfusion.
3. Decreased breath sounds, bradycardia, hypoxia
Answer: Respiratory failure
Rationale: Hypoventilation with hypoxia and bradycardia indicates failure of oxygenation and
ventilation.
4. Gasping respirations, pulse 65 bpm
Answer: Deliver BVM ventilation every 3–5 seconds
Rationale: Bradycardia with poor respirations requires immediate ventilation before chest
compressions.
, 5. Lyme disease with prolonged PR interval
Answer: First-degree AV block
Rationale: Lyme carditis commonly causes conduction delays, especially first-degree AV block.
6. Signs of post–cardiac arrest syndrome
Answer: Hypotension, fever, hyperglycemia
Rationale: PCAS reflects systemic ischemia-reperfusion injury affecting multiple organ systems.
7. High-quality CPR actions
Answers:
• Full chest recoil
• Ventilations lasting ~1 second
• Compression depth ~2 inches
• 15:2 ratio (two rescuers)
Rationale: These actions optimize coronary and cerebral perfusion.
8. Shockable rhythms
Answer: Ventricular fibrillation (VF) and pulseless VT
Rationale: These rhythms respond to defibrillation.
9. Hypotension vs shock
Answer: Hypotension is not a consistent feature of shock
Rationale: Children compensate well; hypotension is a late and ominous sign.
10. Target oxygen saturation
Answer: Above 94%
Rationale: Adequate oxygenation reduces hypoxic injury.
