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CPN: Pediatric Cardiac Conditions

Congenital and acquired heart conditions are a key pediatric nursing focus. These CPN questions cover congenital heart defects, heart failure, and Kawasaki disease — each with a full rationale.

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  • 🔍 Hint highlights — the decisive cue phrases in each stem
  • 📖 Full rationales — why every option is right or wrong

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Written and reviewed by the LexPort exam-prep team, led by our Founder & Exam-Prep Lead. LexPort builds certification practice questions — this is exam-preparation material, not medical advice. Last reviewed August 2026.

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Three CPN practice questions on cpn: pediatric cardiac conditions — tap an answer for instant feedback. The app has 2,200+, timed and scored.

Question 1

A six-year-old patient is recovering on post-operative day one appendectomy. The nurse calculates a PEWS score of three, driven entirely by tachycardia with localized surgical pain at the incision site. Which action should the nurse take?

▸ Why D is the answer

A moderate PEWS score driven by expected postoperative pain and secondary tachycardia warrants targeted intervention and prompt reassessment. Administering prescribed analgesia directly addresses the likely cause of the elevated cardiovascular parameter. Activating the rapid response team, transferring the child to the intensive care unit, or demanding an urgent surgical consultation are premature overreactions without first treating the known pain and evaluating the patient's physiological response.

🔑 Key takeaway

Moderate PEWS elevations driven by expected physiological responses like pain should be treated and reassessed.

Question 2

A 9-year-old patient with suspected appendicitis is admitted to the pediatric unit after experiencing emesis for 12 hours and exhibiting mild tachycardia. Which action should the nurse prioritize while awaiting surgical evaluation?

▸ Why B is the answer

For a patient with suspected appendicitis who has had emesis for 12 hours, the priority is preparing for impending surgery while preventing hypovolemia. Maintaining strict NPO status and starting intravenous fluid hydration is the best action to ensure safety during anesthesia and restore fluid balance. Initiating a clear liquid diet or allowing ice chips violates the strict NPO status requirement for surgery and significantly increases the risk of aspiration. Inserting a nasogastric tube is unnecessarily invasive for standard preoperative management unless the patient has a severe bowel obstruction.

🔑 Key takeaway

Preoperative appendicitis management requires strict NPO status and intravenous hydration to prepare for surgery.

Question 3

A 2-month-old infant presents with a two-week history of poor feeding and mild irritability. The parent reports the infant takes longer than usual to finish a bottle and often falls asleep halfway through. Which finding during the respiratory review of systems best identifies an occult cardiovascular condition?

▸ Why D is the answer

Poor feeding and prolonged feeding times in a 2-month-old can mask occult cardiovascular conditions like congestive heart failure. Noticeable diaphoresis over the forehead during feedings is a classic sign of increased sympathetic tone and cardiac exertion. Nasal flaring during crying is a normal physiological response to distress, not a specific sign of cardiac failure. Intermittent coughing after rapid feeding suggests mild reflux or poor coordination rather than a systemic cardiac issue. Hiccups are a benign, normal diaphragmatic reflex in young infants, completely unrelated to cardiovascular exertion.

🔑 Key takeaway

Forehead diaphoresis during infant feeding is a key indicator of occult congestive heart failure.

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Question 1

A 3-year-old child presents to the clinic with a temperature of 102.4°F (39.1°C) and a cough. The nurse auscultates a grade II/VI systolic murmur that the mother states has never been heard before. The child is well-perfused with brisk capillary refill.

  • A) Attribute the new sound to a hyperdynamic febrile state.✓
  • B) Order a chest radiograph to assess for cardiomegaly.
  • C) Instruct the mother to monitor for sudden cyanotic spells.
  • D) Refer the child immediately for a pediatric echocardiogram.

💡 Key Takeaway

Innocent murmurs often become newly audible during hyperdynamic states such as fever, anemia, or significant anxiety.

Show rationale

Fever creates a hyperdynamic state that increases cardiac output, frequently causing a previously silent innocent systolic murmur to become audible. Because the child is well-perfused and the murmur is low-grade and systolic, attributing it to the fever is the most appropriate clinical judgment. Ordering a chest radiograph (B) is unnecessary radiation for a transient, fever-induced finding. Instructing the mother to monitor for cyanotic spells (C) creates unnecessary anxiety for a benign physiological response. Referring immediately for an echocardiogram (D) is an overreaction; the murmur should simply be reassessed once the child is afebrile.

Question 2

A 10-year-old receives rapid IV adenosine for refractory supraventricular tachycardia. Immediately after the flush, the nurse observes a three-second period of ventricular asystole on the cardiac monitor.

  • A) Initiate cardiopulmonary resuscitation for sudden cardiac arrest right now.
  • B) Prepare the defibrillator for immediate synchronized electrical cardioversion therapy.
  • C) Document the expected transient response and continue close monitoring.✓
  • D) Administer a second larger dose of intravenous adenosine rapidly.

💡 Key Takeaway

A brief period of asystole is an expected pharmacological response following rapid adenosine administration.

Show rationale

A brief period of asystole is an expected, transient response after adenosine administration as it temporarily blocks AV node conduction to terminate the SVT. Initiating CPR or preparing for cardioversion is inappropriate because this brief pause is a normal pharmacological effect, not a true cardiac arrest. Administering a second dose is incorrect because the medication is actively working and the rhythm needs time to reset.

Question 3

A nurse practitioner evaluates a 15 kg toddler on postoperative day one following cardiac surgery. The chest tube output suddenly increases to 55 mL of bright red blood in one hour. What is the most appropriate action?

  • A) Notify the surgical team immediately for evaluation.✓
  • B) Continue to monitor output for another two hours.
  • C) Gently milk the chest tube to clear any clots.
  • D) Increase the wall suction to facilitate drainage.

💡 Key Takeaway

Chest tube output exceeding 3 mL/kg/hr postoperatively requires immediate surgical evaluation for hemorrhage.

Show rationale

Postoperative chest tube drainage greater than 3 mL/kg/hr for more than three consecutive hours or a sudden spike of 5 to 10 mL/kg in one hour indicates potential postoperative hemorrhage. For a 15 kg child, 55 mL in one hour is nearly 3.7 mL/kg/hr of bright red blood. This requires you to notify the surgical team immediately rather than just continuing to monitor the output. Milking the chest tube is not indicated here and can generate dangerous negative intrathoracic pressure. Increasing wall suction does not address the underlying risk of active bleeding and could worsen the situation. Prompt intervention is critical to prevent hemodynamic compromise.

Question 4

The parents of an infant with complex congenital heart disease request a second surgical opinion. The attending surgeon refuses to share the echocardiogram, stating it will only confuse the parents further. How should the nurse respond?

  • A) Encourage the parents to request the records directly from the hospital's medical records department.
  • B) Escalate the surgeon's refusal to the unit manager or the hospital ethics committee immediately.✓
  • C) Agree with the surgeon and offer to explain the current surgical plan more thoroughly.
  • D) Tell the parents they must sign a formal discharge against medical advice to proceed.

💡 Key Takeaway

Nurses have an ethical obligation to escalate situations where a provider obstructs a family's access to records.

Show rationale

Nurses have a duty to advocate for families when their rights are obstructed by other healthcare team members. Escalating the issue ensures the family's right to their medical records is upheld. Option A places an undue burden on the parents during a stressful time and ignores the provider's inappropriate behavior. Option C violates the principle of family autonomy by siding with paternalistic care. Option D is factually incorrect and inappropriately threatening, as seeking a second opinion does not require discharging against medical advice.

Question 5

An infant with congenital heart disease has a pulse oximeter on the right wrist and a noninvasive blood pressure cuff on the right upper arm. The SpO2 drops intermittently.

  • A) Change the blood pressure cuff to continuous mode.
  • B) Secure the oximeter probe with clear medical tape.
  • C) Administer the prescribed fluid bolus for systemic hypotension.
  • D) Relocate the pulse oximeter to the left foot.✓

💡 Key Takeaway

Pulse oximetry sensors must not be placed distal to blood pressure cuffs to avoid venous congestion artifact.

Show rationale

Placing a pulse oximeter distal to a blood pressure cuff causes venous congestion and a temporary loss of pulsatile flow during cuff inflation, resulting in false desaturation alarms. Relocating the sensor to a different limb prevents this mechanical interference. Changing the blood pressure cuff to continuous mode would actually worsen the artifact by constantly occluding flow. Taping the probe does not fix the flow interruption. A fluid bolus treats hypovolemia, not mechanical interference caused by routine cuff inflation.

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CPN · Exam Simulator

A 3-year-old child presents to the clinic with a temperature of 102.4°F (39.1°C) and a cough. The nurse auscul…

A) Attribute the new sound to a hyperdynami
B) Order a chest radiograph to assess for c
C) Instruct the mother to monitor for sudde
D) Refer the child immediately for a pediat
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