What role do blood tests play in diagnosing congenital heart disease?

Blood tests are an important part of assessing suspected congenital heart disease.

While they do not provide a structural diagnosis, they help measure how well the heart is functioning. Tests such as BNP indicate heart strain, while blood gases assess oxygen levels in the bloodstream.

They are also useful in distinguishing between cardiac and respiratory causes of symptoms, especially in newborns.

In addition, genetic blood tests can help identify underlying syndromes associated with heart defects.

Together, these tests support a more accurate and timely diagnosis.

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