-transparent.png){kind=logo}
In fourteen patients referred for preoperative evaluation of heart disease we compared the transthoracic electrical impedance method to the direct Fick (four patients) and dye dilution methods (ten patients) for estimation of cardiac output. On statistical analysis of paired differences we found no reliable agreement between the absolute impedance values and the reference methods. The reproducibility was, however, acceptable, and the coefficient of variation for impedance cardiac output was 7.8%, and for impedance stroke volume 7.6%. Our conclusion is that in patients with advanced heart disease cardiac output cannot be determined with accuracy with the impedance cardiographic method. In clinical practice this must be considered so important, that we hesitate to use the method for monitoring cardiac output in critically ill patients even if the reproducibility for individual changes is acceptable.
E Enghoff, and
O Lövheim
January 1970,
Acta Societatis Medicorum Upsaliensis,
E Enghoff, and
O Lövheim
January 1955,
Scandinavian journal of clinical and laboratory investigation,
E Enghoff, and
O Lövheim
May 1968,
Circulation,
E Enghoff, and
O Lövheim
January 1966,
Scandinavian journal of clinical and laboratory investigation,
E Enghoff, and
O Lövheim
January 1954,
Surgery,
E Enghoff, and
O Lövheim
December 1986,
Critical care medicine,
E Enghoff, and
O Lövheim
May 1998,
Heart (British Cardiac Society),
E Enghoff, and
O Lövheim
July 1976,
Journal of the National Medical Association,
E Enghoff, and
O Lövheim
January 1950,
Acta medica Scandinavica. Supplementum,
E Enghoff, and
O Lövheim
February 1962,
The Journal of laboratory and clinical medicine,
