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An electrocardiogram (ECG) is a graphic representation of the progression of electric activity through the heart. It is often used as a screening test in situations such as suspected congenital heart disease, arrhythmias, chest pain, syncope, acquired heart disease, hypertension, and medication monitoring. See Table 9–1 for ECG reference values.

No abnormal ECG changes.

The etiology of the vast majority of pediatric chest pain is noncardiac, so most ECG findings will be normal. Clinical manifestations that are concerning for underlying cardiac chest pain include chest pain with exertion; diaphoresis; pallor; anxiety; shortness of breath; nausea and/or...

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