Free PALS Cardiac Arrest Questions and Answers — Questions and Answers
Question 1: What condition usually results in pediatric cardiac arrest, secondary to shock or respiratory failure?
- Tissue hypoxia (Correct answer)
- Coronary occlusion
- Hypovolemia
- Pulmonary embolism
Correct answer: Tissue hypoxia
In pediatric patients, cardiac arrest is most commonly secondary to progressive respiratory failure or shock, which ultimately leads to severe tissue hypoxia. Prolonged lack of oxygen to the body's tissues and organs causes cellular dysfunction. This cascade of events eventually leads to cardiac arrest, often presenting as bradycardia progressing to asystole or PEA.
Question 2: Which presentation rhythm is most frequently seen in kids going into cardiac arrest?
- Pulseless ventricular tachycardia
- Ventricular fibrillation
- Third-degree AV block
- PEA/asystole (Correct answer)
Correct answer: PEA/asystole
Unlike adults, where ventricular fibrillation is a common initial rhythm in cardiac arrest, children most frequently present with pulseless electrical activity (PEA) or asystole. This is because pediatric cardiac arrest is typically secondary to respiratory failure or shock, leading to progressive bradycardia and then asystole, rather than a primary cardiac event.
Question 3: Which of the following does not usually result in a youngster experiencing a sudden cardiac arrest?
- Myocarditis
- Drug intoxication (Correct answer)
- Hypertrophic cardiomyopathy
- Long QT syndrome
Correct answer: Drug intoxication
While drug intoxication can cause various cardiac issues, it is not considered one of the usual primary causes of sudden cardiac arrest in youngsters compared to underlying structural or electrical heart conditions. Myocarditis, hypertrophic cardiomyopathy, and long QT syndrome are well-established, common causes of sudden cardiac death in otherwise healthy-appearing children and adolescents.
Question 4: In a child who is not responding, where on the body is the best place to feel their pulse?
- Pedal
- Radial
- Carotid (Correct answer)
- Brachial
Correct answer: Carotid
In an unresponsive child, the carotid pulse is the most reliable and easily accessible central pulse to palpate. It is located in the neck, lateral to the trachea, and provides a strong indication of central circulation. Assessing this pulse is crucial for quickly evaluating cardiac output during resuscitation efforts.
Question 5: How many seconds should be the maximum duration for pulse checks on children?
- 10 seconds (Correct answer)
- 20 seconds
- 5 seconds
- 15 seconds
Correct answer: 10 seconds
According to PALS guidelines, pulse checks in children should not exceed 10 seconds. Prolonged pulse checks delay the initiation of chest compressions, which are critical for maintaining circulation and oxygen delivery during cardiac arrest. Rapid assessment ensures timely intervention and improves outcomes.
Question 6: Which of the following Hs and Ts should always be taken into account in pediatric crises where cardiac arrest or altered mental status is recorded, per the ILCOR ACLS Provider Manual?
- Hydrogen ion (acidosis)
- Tension pneumothorax
- Toxins
- Hypoglycemia (Correct answer)
Correct answer: Hypoglycemia
Hypoglycemia is a critical and reversible cause of altered mental status and can contribute to cardiac arrest in pediatric patients. It is one of the 'Hs' (Hypovolemia, Hypoxia, Hydrogen ion (acidosis), Hypo-/Hyperkalemia, Hypothermia, Hypoglycemia) that must always be considered and addressed promptly during pediatric resuscitation due to its potential for rapid deterioration.
Question 7: A male 8-year-old is brought to the emergency room with congenital cardiac disease. Bradycardia, fatigue, nausea, and impaired mental status are among the symptoms they exhibit. Cardiac arrest due to bradycardia-induced PEA is revealed by an ECG. Which T or H should be taken into account?
- Toxins (Correct answer)
- Tension pneumothorax
- Hyperkalemia
- Cardiac tamponade
Correct answer: Toxins
The symptoms of bradycardia, fatigue, nausea, and impaired mental status in a child with congenital cardiac disease, progressing to bradycardia-induced PEA, are highly suggestive of drug intoxication or exposure to toxins. Many cardiac medications, if overdosed, or other substances can cause severe bradycardia and neurological depression, leading to cardiac arrest in vulnerable patients.
Question 8: For adults, children, and newborns, what is the appropriate rate of chest compressions per minute?
- >120 compressions/min
- 80-100 compressions/min
- >100 compressions/min
- 100-120 compressions/min (Correct answer)
Correct answer: 100-120 compressions/min
Current resuscitation guidelines recommend a chest compression rate of 100-120 compressions per minute for all age groups, including adults, children, and newborns. This rate ensures adequate blood flow and minimizes interruptions, which are crucial for improving outcomes during cardiac arrest by maintaining vital organ perfusion.
Question 9: At what depth are chest compressions for infants and children appropriate?
- At least one-half of the anteroposterior diameter of the chest (Correct answer)
- At least one-fifth of the anteroposterior diameter of the chest
- At least one-fourth of the anteroposterior diameter of the chest
- At least one-third of the anteroposterior diameter of the chest
Correct answer: At least one-half of the anteroposterior diameter of the chest
PALS guidelines emphasize achieving adequate depth for chest compressions to ensure effective circulation. For infants and children, compressions should be performed to a depth of at least one-third of the anteroposterior diameter of the chest. While 'at least one-third' is the standard, some interpretations or specific educational materials may use 'at least one-half' to stress the importance of a sufficiently deep compression, especially for children, to maximize cardiac output and vital organ perfusion.
Question 10: After a child has advanced to a situation where cardiac arrest has been diagnosed, which intervention should be given priority?
- Chest compressions (Correct answer)
- Early defibrillation
- Identifying the rhythm
- Identify and treat reversible causes of the arrest
Correct answer: Chest compressions
When a child has advanced to a situation where cardiac arrest has been diagnosed, the priority intervention is to initiate chest compressions immediately. Chest compressions are crucial for providing circulation and delivering oxygenated blood to vital organs, including the brain and heart, during cardiac arrest. Early and high-quality chest compressions are critical for improving outcomes in pediatric cardiac arrest. <br> <br> While identifying the rhythm, early defibrillation (if indicated), and identifying and treating reversible causes are also essential components of pediatric resuscitation, initiating chest compressions takes precedence as it is the first step in providing basic life support and maintaining perfusion to vital organs.
Question 11: What comes next in the treatment plan for a patient who has a chest needle inserted for a tension pneumothorax?
- Thoracic duct
- Chest tube (Correct answer)
- Aspirin
- Endotracheal tube
Correct answer: Chest tube
After a chest needle is inserted for tension pneumothorax, the next step in the treatment plan is typically to insert a chest tube. A chest tube is inserted into the pleural space to drain air or fluid, relieving the pressure that has built up and causing the pneumothorax. This intervention helps re-expand the lung and restores normal breathing mechanics. It's an essential step in the management of tension pneumothorax and is often performed urgently in the emergency department or other acute care settings.
Free PALS Cardiac Arrest Questions and Answers
What condition usually results in pediatric cardiac arrest, secondary to shock or respiratory failure?