What is the most common symptom of aortic stenosis in children?

The most prevalent symptom of aortic stenosis in children is syncope during exertion. This condition is characterized by a narrowing of the aortic valve, which makes it difficult for the heart to pump blood into the aorta. As a result, during physical activity when the heart's demand for blood increases, the heart may not be able to provide sufficient blood flow, leading to syncope or fainting spells. This symptom is particularly alarming because it indicates that the heart is struggling to meet the body's demands, highlighting the critical nature of the condition.

While children with aortic stenosis may also experience chest pain, palpitations, and fatigue, these are less specific symptoms and may not occur as frequently during physical activity. Fatigue after minimal exertion can occur, but it is not typically the most prominent symptom young patients report. In clinical practice, syncope during exertion is a key indicator prompting further investigation into potential aortic stenosis, making it the most common symptom associated with this condition in pediatric patients.