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Data gathered during a longitudinal study of cardiac output throughout pregnancy, measured by application of impedance cardiography, have been reassessed in respect to individual items of measurement. Examination of the pattern of change in these values did not reveal any flaw in the proposition that impedance cardiography, with the invocation of the Kubicek equation, can confidently be applied in such a study.
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Davies et al. (1986) studied this question.
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