Hypoplastic Left Heart Syndrome (Hlhs):
A congenital anomaly in which half (left) of the heart is not properly formed. The heart structures usually affected are; the mitral valve, the left ventricle, the aortic valve, and the aorta. Because the left side of the heart is underdeveloped, oxygenated blood cannot be pumped to the body (tissues). This condition is uniformily fatal without surgical intervention.
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