Pediatric Imaging

What Imaging Is Best for a Child with Chest Pain and Suspected Cardiac Disease?

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What Imaging Is Best for a Child with Chest Pain and Suspected Cardiac Disease?

A 10-year-old with a history of Kawasaki disease presents to the clinic with intermittent, sharp chest pain over the past week, worse with exertion. An electrocardiogram (ECG) shows non-specific T-wave changes. You are concerned about a potential cardiac etiology, such as a coronary artery aneurysm or myocardial ischemia, and need to decide on the most appropriate initial imaging study. This article provides a clinical workflow for this specific scenario: a child with chest pain and known or suspected cardiac disease, guiding you through the differential, study rationale, and downstream decision-making. Based on the American College of Radiology (ACR) Appropriateness Criteria, the initial imaging study of choice, `US echocardiography transthoracic resting`, is rated Usually Appropriate.

Who Fits This Clinical Scenario?

This guidance applies to pediatric patients presenting with chest pain where there is a pre-existing diagnosis of cardiac disease or a high index of suspicion for one. This includes, but is not limited to, children with:

  • Known congenital heart disease (repaired or unrepaired)
  • History of myocarditis, pericarditis, or Kawasaki disease
  • Diagnosed cardiomyopathy (hypertrophic, dilated, restrictive)
  • Significant family history of early-onset cardiac disease or sudden cardiac death
  • Concerning physical exam findings (e.g., a new or significant heart murmur, gallop, friction rub) or abnormal ancillary tests (e.g., elevated troponin, abnormal ECG).

This workflow is distinct from other common pediatric chest pain presentations. If the pain is clearly reproducible with palpation and localized to the chest wall, the workup follows a different path focused on musculoskeletal causes. Similarly, if the primary suspicion is for a pulmonary embolism (PE) or a pneumothorax, those scenarios have their own dedicated imaging algorithms. This article is specifically for when the clinical concern is centered on the heart itself as the source of the pain.

What Diagnoses Are You Working Up in This Scenario?

In a child with a known or suspected cardiac condition, chest pain raises concern for several potentially serious diagnoses that imaging aims to evaluate. The differential is narrower and more focused than in a child with no cardiac history.

Pericarditis or Myocarditis: Inflammation of the pericardium or myocardium is a leading cardiac cause of chest pain in children. It can be idiopathic or secondary to a viral infection. The pain is often sharp, pleuritic, and may be relieved by leaning forward. Imaging is crucial to assess for pericardial effusion, which can lead to tamponade, and to evaluate myocardial function, which can be depressed in myocarditis.

Coronary Artery Anomalies: While rare, anomalous coronary arteries are a significant cause of exertional chest pain, syncope, and sudden cardiac death in young people. An anomalous left coronary artery arising from the pulmonary artery (ALCAPA) or a coronary artery coursing between the great vessels can cause myocardial ischemia. A history of Kawasaki disease specifically raises concern for acquired coronary artery aneurysms, which can thrombose or stenose.

Structural or Valvular Disease Complications: Children with known structural heart disease, such as significant aortic stenosis or hypertrophic cardiomyopathy (HCM), can experience chest pain due to supply-demand mismatch and myocardial ischemia. Imaging helps assess the severity of the underlying lesion, evaluate for worsening obstruction, and measure ventricular function and wall thickness.

Arrhythmia-Related Ischemia: While less common, a sustained tachyarrhythmia can cause chest pain due to increased myocardial oxygen demand. While the arrhythmia is diagnosed by ECG, imaging is used to evaluate for an underlying structural cause.

Why Is US Echocardiography the Recommended Initial Study?

For a child presenting with chest pain and suspected cardiac disease, the ACR designates `US echocardiography transthoracic resting` as Usually Appropriate. A `Radiography chest` is also rated Usually Appropriate and is often performed concurrently as a complementary baseline study.

The rationale for prioritizing echocardiography is multifaceted. First and foremost, it involves no ionizing radiation (0 mSv), a critical consideration in the pediatric population. It provides a wealth of dynamic, real-time information directly addressing the primary differential diagnoses. An echo can readily identify a pericardial effusion (for pericarditis), assess global and regional systolic function (for myocarditis or ischemia), measure ventricular wall thickness (for HCM), and evaluate valvular structure and function (for stenosis or regurgitation). Critically, skilled pediatric sonographers can often visualize the proximal coronary artery origins to screen for major anomalies.

In contrast, more advanced imaging modalities are reserved for problem-solving. For instance, `CTA coronary arteries with IV contrast` is rated May be appropriate. While it provides exquisite detail of the coronary anatomy, it carries a significant radiation dose for a child (☢☢☢☢ 3-10 mSv) and requires IV contrast. It is best used as a second-line test if the echocardiogram is non-diagnostic or raises a specific concern for a coronary anomaly that cannot be fully delineated.

Similarly, cardiac MRI (eg, `MRI heart function and morphology without and with IV contrast`) is rated Usually not appropriate for the initial imaging workup. Although it is an excellent, radiation-free modality for assessing myocardial tissue characteristics (e.g., for myocarditis) and function, it is less available, more time-consuming, and often requires sedation in younger children. It typically serves as a downstream study after an initial assessment with echocardiography.

What’s Next After Echocardiography? Downstream Workflow

The results of the initial transthoracic echocardiogram (TTE) will guide the subsequent clinical pathway. The workflow branches based on whether the findings are positive, negative, or indeterminate.

If the TTE is positive: A definitive finding, such as a large pericardial effusion, severely depressed ventricular function, or a clear coronary anomaly, will direct immediate management. A large effusion may necessitate pericardiocentesis. Depressed function warrants admission for management of heart failure and further workup for myocarditis. A suspected coronary anomaly would prompt consultation with pediatric cardiology and likely lead to a more definitive imaging study like a cardiac CTA or MRI, or even cardiac catheterization.

If the TTE is negative: A completely normal echocardiogram is highly reassuring and significantly lowers the probability of a life-threatening cardiac cause. If the clinical suspicion remains high despite a normal TTE, further non-invasive testing like a stress test (if the child is old enough to cooperate) or ambulatory ECG monitoring may be considered. If the pain resolves and the exam is benign, the focus may shift to non-cardiac causes, such as musculoskeletal or gastrointestinal etiologies.

If the TTE is indeterminate: Sometimes, the initial study provides ambiguous results. For example, the coronary artery origins may be poorly visualized, or there may be subtle, non-specific findings of wall motion abnormality. In these cases, the next step is often a more advanced, problem-solving imaging modality. This is the clinical scenario where a `CTA coronary arteries with IV contrast` or a cardiac MRI becomes appropriate to clarify the anatomy or tissue characteristics, respectively.

Pitfalls to Avoid (and When to Get Help)

Several common pitfalls can occur in this specific clinical workflow. First, avoid anchoring on a non-cardiac diagnosis too early in a child with a known cardiac history; their pre-test probability for a cardiac cause is inherently higher. Second, do not accept a technically limited echocardiogram as “normal” if a key part of the differential (like coronary origins) was not adequately visualized; this is a key reason for indeterminate results. Third, remember that a normal resting TTE does not entirely rule out demand-ischemia from a condition like an anomalous coronary artery that only manifests with exertion. If the history is compelling for exertional symptoms, a negative resting study may not be the end of the workup. If the patient presents with hemodynamic instability, syncope, or a severely abnormal ECG, immediate consultation with a pediatric cardiologist is warranted, often in parallel with initial imaging.

Related ACR Topics and Tools

This article focuses on a single, specific clinical scenario. For a comprehensive overview of all pediatric chest pain presentations and their corresponding imaging recommendations, please consult the parent topic article. For additional resources to aid in your clinical decision-making, the following tools are available.

Frequently Asked Questions

Why is a chest radiograph also ‘Usually Appropriate’ if echocardiography is the main study?

A chest radiograph (CXR) and an echocardiogram provide complementary information. While the echo is superior for cardiac structure and function, the CXR is excellent for evaluating heart size (cardiomegaly), the pulmonary vasculature, and ruling out other non-cardiac causes of chest pain in the lungs or mediastinum. It is a fast, low-dose (<0.03 mSv) study that provides crucial context for the overall clinical picture.

Should I order a stress echocardiogram for a child with exertional chest pain?

For the *initial* imaging of this scenario, the ACR rates `US echocardiography transthoracic stress` as *Usually not appropriate*. A resting echocardiogram is the correct first step to evaluate for structural abnormalities. A stress test may be a valuable *downstream* study if the resting echo is normal but the clinical suspicion for exertional ischemia remains high, but it is not the recommended starting point.

When is cardiac CT or MRI the right first choice instead of an echocardiogram?

Almost never for the initial evaluation in this scenario. Echocardiography’s lack of radiation and excellent diagnostic capability make it the clear first-line choice. Cardiac CT or MRI are powerful problem-solving tools used *after* an initial echo is performed, either to clarify ambiguous findings (e.g., poorly visualized coronary arteries) or to provide more detailed tissue characterization (e.g., for suspected myocarditis).

What if my patient has a history of Kawasaki disease but a normal echocardiogram years ago?

A history of Kawasaki disease permanently places a child in a higher-risk category for coronary artery pathology. Even with a previously normal echo, new-onset chest pain warrants a new, comprehensive transthoracic echocardiogram with specific attention to the coronary arteries to look for newly developed aneurysms or stenosis.

Is a transesophageal echocardiogram (TEE) an option?

A transesophageal echocardiogram (TEE) is rated *Usually not appropriate* for this initial workup. TEE is an invasive procedure requiring sedation or general anesthesia and is typically reserved for intraoperative guidance or for situations where transthoracic imaging is technically inadequate, which is less common in children than in adults.

Reviewed by Pouyan Golshani, MD, Interventional Radiologist — May 30, 2026