# A 4-year-old child diagnosed with Kawasaki disease is in the acute phase and has developed coronary artery aneurysms. Which nursing intervention should be the highest priority?

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> subject: Infectious Diseases

## 문제

A 4-year-old child diagnosed with Kawasaki disease is in the acute phase and has developed coronary artery aneurysms. Which nursing intervention should be the highest priority?

## 보기

1. Encourage active play to maintain normal childhood activities
2. Administer aspirin as prescribed for anti-inflammatory effects
3. Monitor for signs of myocardial infarction and maintain strict bed rest **✔ 정답**
4. Apply cool compresses to reduce fever and inflammation

**정답: 3**

## 해설

Children with Kawasaki disease and coronary artery aneurysms are at high risk for thrombosis and myocardial infarction. The highest priority is strict monitoring for cardiac signs and maintaining bed rest to minimize cardiac strain.

## 심화 해설

Understanding the Priority in Acute Kawasaki Disease with Coronary Artery Aneurysms

When a child with Kawasaki disease enters the acute phase and has already developed coronary artery aneurysms, the pathophysiological focus shifts dramatically. The inflammation of the vessel walls leads to endothelial dysfunction, turbulent blood flow within the dilated segments, and a profound risk of thrombosis. The highest priority nursing intervention must directly address the most life-threatening complication: myocardial infarction (MI) due to thrombotic occlusion of the aneurysmal coronary artery. The American Heart Association's scientific statement highlights that as coronary artery issues evolve in pediatric conditions like Kawasaki disease, targeted ischemic testing and vigilant monitoring for coronary events become a high priority [1]. This directly supports the rationale that preventing and detecting myocardial ischemia is paramount.

Let's analyze the options through this lens. Administering aspirin (Option 2) is a cornerstone of treatment, but in the acute phase with large aneurysms, the prescribed dose is typically high-dose for its anti-inflammatory effect, later transitioning to a low, antiplatelet dose to prevent thrombosis. While essential, the act of administering a medication is a task; the priority is the continuous clinical assessment that determines the medication's effectiveness and the child's evolving condition. Encouraging active play (Option 1) is contraindicated. Physical exertion increases myocardial oxygen demand, which can trigger an acute coronary event in a child with already compromised coronary arteries. Applying cool compresses (Option 4) addresses the symptom of fever, a comfort measure that is far lower in priority than monitoring for a fatal cardiac event.

The correct answer is to monitor for signs of myocardial infarction and maintain strict bed rest (Option 3). This intervention is a two-part, high-priority action. Strict bed rest reduces myocardial oxygen consumption, decreasing the workload on a heart at risk for ischemia. Simultaneously, meticulous monitoring—including continuous cardiac telemetry, frequent vital sign assessment, and observation for subtle signs of MI such as unexplained irritability, pallor, vomiting, or diaphoresis in a young child—is critical for early detection and intervention. The 2025 AHA statistical update underscores the significant burden of cardiovascular disease and risk factors, reinforcing that in a high-risk patient with a structural vascular complication like an aneurysm, the primary nursing focus is on preventing and recognizing acute cardiovascular events . The evidence from studies on coronary ischemic testing further validates that children with acquired coronary issues, such as those from Kawasaki disease, require a thoughtful and prioritized approach to monitoring for ischemia [1].References (research sources)

- [1]Multimodality Approach to Coronary Ischemic Testing in Pediatric Patients: A Scientific Statement From the American Heart Association.Research articleOlivieri LJ, Lee S, Chen MH, Dahdah N, Doan TT, Jegatheeswaran A, Krishnamurthy R, Selamet Tierney ES, Weber EM, Rao A, American Heart Association Council on Lifelong Congenital Heart Disease and Heart Health in the Young, and the Council on Cardiovascular and Stroke Nursing. (2026) · DOI: 10.1161/jaha.125.047790

## 임상 시나리오

Clinical Priority Guide: Acute Kawasaki Disease with Aneurysms

When a child in the acute phase of Kawasaki disease develops coronary artery aneurysms, the primary nursing focus shifts from general symptom management to preventing the most immediate, life-threatening complication: thrombotic myocardial infarction (MI).

Highest Priority: Monitor for Myocardial Ischemia

- **Continuous Cardiac Monitoring:** Observe for ST-segment changes, T-wave inversion, or arrhythmias.

- **Frequent Vital Signs:** Monitor for hypotension, tachycardia, or new-onset gallop rhythm (S3/S4).

- **Symptom Assessment:** Assess for chest pain, extreme irritability, pallor, diaphoresis, or unexplained vomiting in young children, as these can be anginal equivalents.

- **Strict Bed Rest:** Enforce complete bed rest to reduce myocardial oxygen consumption and minimize shear stress on inflamed, aneurysmal vessel walls.

Contraindicated Interventions

- **Avoid Active Play or Ambulation:** Any activity that increases heart rate and myocardial oxygen demand can precipitate an acute coronary event.

- **Cluster Care:** Organize nursing interventions to allow for uninterrupted periods of rest.

Pharmacological Management Context

While administering prescribed high-dose aspirin for its anti-inflammatory effect is a critical task, it is secondary to the continuous assessment for MI. The nurse must understand the dual role of aspirin:

- **Acute Phase:** High-dose (80-100 mg/kg/day divided every 6 hours) for inflammation.

- **Post-acute Phase:** Low-dose (3-5 mg/kg/day once daily) for antiplatelet effect to prevent thrombosis within aneurysms.

Anticipate the transition and confirm the prescribed dose aligns with the clinical phase and echocardiogram findings.

Patient & Family Education

- Explain the strict bed rest requirement using simple terms: "We need to keep your heart resting and calm so it can heal."

- Teach parents to immediately report any signs of distress, such as sudden crying, clutching the chest, or changes in skin color.

- Prepare the family for the long-term need for cardiology follow-up and potential anticoagulation therapy.

## 핵심 개념

- **Coronary Artery Aneurysm** — An abnormal dilatation of a coronary artery, a serious complication of Kawasaki disease, increasing the risk of thrombosis and myocardial infarction.
- **Myocardial Infarction (MI)** — Necrosis of heart muscle caused by an obstructed blood supply, the most life-threatening risk in Kawasaki disease with aneurysms.
- **Kawasaki Disease Acute Phase** — The initial febrile stage (days 1-14) characterized by systemic vasculitis, posing the highest risk for coronary artery inflammation and aneurysm formation.
- **Aspirin Therapy in Kawasaki Disease** — High-dose aspirin (80-100 mg/kg/day) is used for anti-inflammatory effects in the acute phase, later reduced to an antiplatelet dose (3-5 mg/kg/day).

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