No abstract available
MeSH terms
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Aged
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Comorbidity
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Echocardiography
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Heart Valve Prosthesis Implantation
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Humans
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Male
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Middle Aged
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Mitral Valve / surgery
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Mitral Valve Insufficiency / diagnostic imaging*
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Mitral Valve Insufficiency / epidemiology*
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Mitral Valve Insufficiency / surgery
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Polymyositis / epidemiology*
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Severity of Illness Index*
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Treatment Outcome