The effect of haematocrit on transthoracic electrical impedance and on the calculation of cardiac output by an impedance cardiograph

1991 ◽  
Vol 17 (3) ◽  
pp. 178-180 ◽  
Author(s):  
A. Thomas ◽  
A. Vohra ◽  
B. Pollard
Keyword(s):  
Cardiac Output ◽  
Electrical Impedance ◽  
Impedance Cardiograph ◽  
Transthoracic Electrical Impedance

Comparison of transthoracic electrical impedance and thermodilution methods for measuring cardiac output

1986 ◽  
Vol 14 (12) ◽  
pp. 1038-1044 ◽  
Author(s):  
KARL D. DONOVAN ◽  
GEOFFREY J. DOBB ◽  
W. PAUL D. WOODS ◽  
BERNARD E. HOCKINGS
Keyword(s):  
Cardiac Output ◽  
Electrical Impedance ◽  
Transthoracic Electrical Impedance

COMPARISON OF ELECTRICAL IMPEDANCE AND THERMAL DILUTION MEASURED CARDIAC OUTPUT IN THE CRITICAL CARE SETTING

1985 ◽  
Vol 13 (4) ◽  
pp. 305 ◽  
Author(s):  
William V. Judy ◽  
David J. Powner ◽  
Kirk Parr ◽  
Robert Demeter ◽  
Christopher Bates ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Critical Care ◽  
Electrical Impedance ◽  
Care Setting ◽  
Critical Care Setting ◽  
Thermal Dilution

Transthoracic electrical impedance in anaesthesia and intensive care

Resuscitation ◽  
1978 ◽  
Vol 6 (2) ◽  
pp. 97-105 ◽  
Author(s):  
G. Tempel ◽  
S. Jelen ◽  
B.v. Hundelshausen
Keyword(s):  
Intensive Care ◽  
Electrical Impedance ◽  
Transthoracic Electrical Impedance

EVALUATION OF IMPEDANCE CARDIAC OUTPUT IN CHILDREN

PEDIATRICS ◽  
1971 ◽  
Vol 47 (5) ◽  
pp. 870-879
Author(s):  
Zuhdi Lababidi ◽  
D. A. Ehmke ◽  
Robert E. Durnin ◽  
Paul E. Leaverton ◽  
Ronald M. Lauer
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Standard Deviation ◽  
Pulmonary Blood Flow ◽  
Impedance Measurement ◽  
Aortic Insufficiency ◽  
Mean Difference ◽  
Dye Dilution ◽  
Impedance Cardiograph ◽  
Indicator Dye

In 20 children without shunts or valvular insufficiency, duplicate dye dilution and impedance cardiac outputs (ICO) were carried out. The duplicate dye dilutions had a standard deviation 0.259 L/min/m2, while duplicate ICO had a standard deviation 0.192 L/min/m2 (F = 1.82, p < 0.05). Of 53 sequential estimates, cardiac outputs measured by both indicator dye dilution and ICO had a 5.5% mean difference. In 21 subjects with left to right shunts, the ICO related well with pulmonary blood flow (r = 0.92) rather than systemic flow (r = 0.21). In 13 subjects with aortic insufficiency, sequential Fick and ICO had a 50% mean difference; the impedance measurement was found to be higher in every case. These data indicate that the impedance cardiograph can provide a noninvasive measure of cardiac output when there are no shunts or valvular insufficiencies. In subjects with left to right shunts the impedance cardiograph provides a measure of the pulmonary blood flow. When aortic insufficiency exists the impedance cardiograph is distorted such that it is consistently higher than Fick cardiac output.

Estimation of cardiac output by electrical impedance during arm exercise in women

1981 ◽  
Vol 51 (6) ◽  
pp. 1488-1492 ◽  
Author(s):  
D. S. Miles ◽  
M. N. Sawka ◽  
S. W. Wilde ◽  
B. M. Doerr ◽  
M. A. Frey ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Electrical Impedance ◽  
Arm Exercise
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