Measurement of cardiac output in pregnancy by thermodilution and impedance techniques

Summary. To assess the value of impedance cardiography in pregnancy, simultaneous measurements of cardiae 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.

[1]  W. Shoemaker,et al.  Comparison of measurements of cardiac output by bioimpedance and thermodilution in severely ill surgical patients , 1986, Critical care medicine.

[2]  D P Bernstein,et al.  A new stroke volume equation for thoracic electrical bioimpedance: Theory and rationale , 1986, Critical care medicine.

[3]  D P Bernstein,et al.  Continuous noninvasive real‐time monitoring of stroke volume and cardiac output by thoracic electrical bioimpedance , 1986, Critical care medicine.

[4]  M. Swiet,et al.  The measurement of cardiac output by electrical impedance plethysmography in pregnancy. Are the assumptions valid? , 1986, British journal of obstetrics and gynaecology.

[5]  I. Milsom,et al.  Measurement of cardiac stroke volume by impedance cardiography in the last trimester of pregnancy , 1983, Acta obstetricia et gynecologica Scandinavica.

[6]  J. S. Crawford,et al.  A longitudinal study of cardiovascular dynamic changes throughout pregnancy. , 1982, European journal of obstetrics, gynecology, and reproductive biology.

[7]  J. S. Crawford,et al.  A longitudinal study of cardiovascular dynamic changes throughout pregnancy , 1981 .

[8]  P. Arnsbo,et al.  Measurements of cardiac stroke volume in various body positions in pregnancy and during Caesarean section: a comparison between thermodilution and impedance cardiography. , 1979, Scandinavian journal of clinical and laboratory investigation.

[9]  P. Arnsbo,et al.  Measurement of Rapid Changes in Cardiac Stroke Volume. An Evaluation of the Impedance Cardiography Method , 1977, Acta anaesthesiologica Scandinavica.