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Aortic stenosis may be congenital (present from before birth), but is often diagnosed during teenage years.

Many children have innocent heart murmurs that don?t require any treatment, but medical tests are often needed to check.

Williams syndrome often goes undiagnosed, which means that some people with the disorder fail to get the support and treatment they need until later in life.

Postural hypotension is the lightheaded feeling you may get if you leap out of bed very quickly.