Which feature suggests a non-cardiac cause of syncope in a pediatric patient?

Which feature suggests a non-cardiac cause of syncope in a pediatric patient?

• A. Palpitations
• B. Family history of sudden death
• C. Normal physical exam
• D. Abnormal ECG

Answer: (C)

A normal physical examination in a child who has syncope most strongly points toward a non-cardiac cause, such as vasovagal or orthostatic syncope. When the exam is unremarkable, there are no signs of structural heart disease, heart failure, or acute arrhythmia identified on physical cues, which makes a cardiac etiology less likely. To contrast, features like palpitations raise concern for a tachyarrhythmia, a family history of sudden death suggests inherited cardiac conditions, and an abnormal ECG directly indicates an electrical or structural heart issue. These red flags push the likelihood toward a cardiac cause, whereas a normal exam keeps non-cardiac causes as the more probable explanation.

A normal physical examination in a child who has syncope most strongly points toward a non-cardiac cause, such as vasovagal or orthostatic syncope. When the exam is unremarkable, there are no signs of structural heart disease, heart failure, or acute arrhythmia identified on physical cues, which makes a cardiac etiology less likely.

To contrast, features like palpitations raise concern for a tachyarrhythmia, a family history of sudden death suggests inherited cardiac conditions, and an abnormal ECG directly indicates an electrical or structural heart issue. These red flags push the likelihood toward a cardiac cause, whereas a normal exam keeps non-cardiac causes as the more probable explanation.