Symptoms in the newborn: Approximately 80 to 90 percent of congenital heart defects are apparent at birth or during the first few months of life. They include:
Symptoms in child or adult: A small minority of heart abnormalities never result in symptoms. Usually, however, symptoms become more apparent with age. Symptoms in the older child, adolescent, or adult can develop gradually, making some heart defects difficult to recognize. Symptoms can include:
Last reviewed on 2/11/2009
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