No abstract available
MeSH terms
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Aged
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Critical Care
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Echocardiography, Transesophageal / adverse effects
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Echocardiography, Transesophageal / instrumentation*
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Female
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Head Protective Devices*
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Heart Valve Prosthesis Implantation
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Humans
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Intubation, Gastrointestinal
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Mitral Valve / surgery
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Noninvasive Ventilation / instrumentation*