No abstract available
MeSH terms
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Child
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Child, Preschool
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Echocardiography*
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Heart Defects, Congenital / physiopathology*
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Heart Defects, Congenital / surgery
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Heart Ventricles / physiopathology
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Humans
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Infant
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Postoperative Period
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Pulmonary Valve Stenosis / physiopathology*