No abstract available
MeSH terms
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Adult
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Aged
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Aged, 80 and over
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Cardiac Catheterization / instrumentation*
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Echocardiography / instrumentation*
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Echocardiography, Doppler, Color / instrumentation
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Endosonography / instrumentation*
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Equipment Design
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Female
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Heart Diseases / diagnostic imaging*
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Heart Diseases / therapy
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Humans
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Male
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Middle Aged
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Sensitivity and Specificity
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Transducers*