Why the study?
Does impedance cardiography accurately measure cardiac output compared to thermodilution in pregnant women requiring pulmonary artery catheterization?
Does impedance cardiography accurately measure cardiac output compared to thermodilution in pregnant women requiring pulmonary artery catheterization?
Impedance cardiography is not an accurate method for measuring cardiac output in hypertensive pregnant women when compared to the invasive thermodilution standard.
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Impedance cardiography may not reliably measure cardiac output in hypertensive pregnant women; leaves open validation against thermodilution in prospective studies.
To assess the value of impedance cardiography in pregnancy, simultaneous measurements of cardiac output were made with impedance and thermodilution techniques in 10 patients who required pulmonary artery catheterization. The methods correlated poorly (r = 0.17). The discrepancy between methods was particularly pronounced in hypertensive patients. Impedance cardiography does not measure cardiac output accurately in hypertensive pregnant women.
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Easterling et al. (1989) studied this question.
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