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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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  • 💡 Key Takeaways — the one transferable rule per question
  • 🔍 Hint highlights — the decisive cue phrases in each stem
  • 📖 Full rationales — why every option is right or wrong

Every CPN question is written to the current exam outline for quick learning and a clear pass strategy.

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

127 of 150. An 18-year-old with complex congenital heart disease admits they rely entirely on parents for insurance navigation and pharmacy calls. To foster practical independence, which intervention should the nurse implement during today's visit?

▸ Why C is the answer

Fostering independence in older adolescents requires active, supported practice of administrative healthcare tasks. Option C is correct because guiding the patient through a real-world task like calling insurance builds confidence and practical navigation skills. Option A ignores the patient's need to learn how to manage their own healthcare logistics. Option B may not be medically or financially indicated and does not teach daily navigation skills. Option D is overly academic, overwhelming, and lacks the hands-on application necessary for effective adult learning.

🔑 Key takeaway

Supported, hands-on practice with administrative tasks builds essential healthcare navigation skills for young adults.

Question 2

150 of 150. A 7-year-old child is being evaluated for a new murmur. The nurse hears a grade II/VI soft, systolic ejection murmur at the left upper sternal border. The nurse also notes a widely split S2 that does not vary with respiration. The child has normal growth parameters.

▸ Why C is the answer

While a soft systolic ejection murmur can sometimes be innocent, a fixed split S2 that does not vary with respiration is a hallmark sign of an atrial septal defect, making this a pathologic murmur. Recognizing this structural defect is essential for appropriate referral. Concluding this is an innocent murmur (A) is incorrect because an innocent pulmonary flow murmur features a normally splitting S2. Restricting fluid intake (B) is not a standard initial intervention for an undiagnosed, asymptomatic child. Scheduling a routine reassessment at the next annual visit (D) delays necessary diagnostic evaluation for a potential congenital heart defect.

🔑 Key takeaway

A widely split S2 that does not vary with respiration indicates a pathologic murmur, often an atrial septal defect.

Question 3

29 of 150. A 2-year-old with congenital heart disease and failure to thrive is seen in the clinic two days after an emergency department visit for dehydration.

▸ Why A is the answer

A core function of the medical home is providing continuous care and preventing fragmentation after acute events. Performing medication reconciliation and reviewing the ED summary ensures safety and continuity for a medically complex child. Option B might be needed eventually but ignores the immediate post-ED transition needs. Option C delays necessary acute follow-up and assumes the cardiologist should manage the dehydration aftermath. Option D is a generic intervention that doesn't address the recent acute dehydration event or ensure safe transitions of care.

🔑 Key takeaway

The medical home ensures safe transitions of care by performing medication reconciliation following acute emergency visits.

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Question 1

5 of 150. 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

78 of 150. 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

85 of 150. 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

128 of 150. 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

68 of 150. 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

5 of 150. A 3-year-old child presents to the clinic with a temperature of 102.4°F (39.1°C) and a cough. The nu…

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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