Elsevier

American Heart Journal

Volume 120, Issue 5, November 1990, Pages 1166-1172
American Heart Journal

Noninvasive assessment of cardiac output in children using impedance cardiography

https://doi.org/10.1016/0002-8703(90)90132-HGet rights and content

Abstract

This study evaluated the effect of intracardiac shungting on the accuracy of thoracic bioimpedance-derived cardiac output determinations. Twenty-six patients, ranging in age from 3 months to 17 years, underwent cardiac catheterization during which simultaneous Fick and impedance measurements of cardiac output were obtained. The subjects were divided into three groups: 10 children with no intracardiac shunts, nine children with predominant left-to-right intracardiac shunts, and seven children with predominant right-to-left intracardiac shunts. Positive correlations between impedance and Fick-derived cardiac output determinations were obtained in the non-shunt group (r = 0.84), with lower correlations in the left-to-right shunt group (r = 0.70). In the right-to-left shunt group, the impedance derived cardiac output correlated with Fick pulmonary flow (r = 0.82), but the variability was unacceptably large. Although further study is needed, impedance cardiography appears to have validity as a methodology in pediatric critical care and cardiovascular health research.

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    Supported by National Institutes of Health Grants HL41781 and HL35073 and by research grant awards from the Research Institute and the Department of Pediatrics at the Medical College of Georgia.

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