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- W2368959246 abstract "Objective To discuss the spectral characteristics of the superior vena cava(SVA) and the regular pattern of its variation with respiratory movement in health adults.Methods All health adults were examined in prostration position with echocardiography placed in the right supraclavicular fossa to observe the SVC.The peak velocity and the velocity-time integral(VTI) of each spectral pattern were measured.The ratio of respiratory changes was computed.Results The image of SVC was clear in long axis view with echocardiography placed in the right supraclavicular fossa.The amplitudes of S wave and D wave were higher than those of AR wave and VR.At the time of eupnea,the variation of dominant wave was conspicuous(P0.05).the amplitudes was increased at the time of inspiratory and reduced at the time of expiratory.In whole respiratory cycle,the amplitudes of S wave was bigger than those of D wave,but the variation of VR wave and AR wave were not conspicuous(P0.05).The variation rate of velocity and time integral(VTI) of dominant wave in expiratory phase was smaller obviously than that in inspiratory phase(P0.05).The variation rate of VTI of D wave in expiratory phase was bigger than that of S wave in inspiratory phase(P0.05).Conclusion The image of SVC can be obtained clearly in long axis view with echocardiography placed in the right supraclavicular fossa to observe the SVC.Spontaneously breathing can influence the shape and parameter of flow spectral patterns of SVC." @default.
- W2368959246 created "2016-06-24" @default.
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- W2368959246 date "2008-01-01" @default.
- W2368959246 modified "2023-09-25" @default.
- W2368959246 title "A Clinical Study on Doppler Flow Spectral Patterns of the Superior Vena Cava in Health Adults" @default.
- W2368959246 hasPublicationYear "2008" @default.
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