No abstract available
MeSH terms
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Aged
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Aged, 80 and over
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Echocardiography / instrumentation*
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Echocardiography / methods
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Female
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Heart Function Tests / instrumentation*
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Humans
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Male
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Monitoring, Intraoperative / instrumentation*
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Monitoring, Intraoperative / methods
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Orthopedic Procedures
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Prospective Studies
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Reproducibility of Results
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Respiratory Mechanics
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Stroke Volume
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Vena Cava, Inferior