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Letter

Cardiac-related impedance changes obtained by electrical impedance tomography: an acceptable parameter for assessment of pulmonary perfusion?

Gerhard Hellige* and Guenter Hahn

Author Affiliations

University Hospital Goettingen, Centre of Anaesthesiology, Intensive and Critical Care Medicine, Robert-Koch-Straße 40D, 37075 Goettingen, Germany

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Critical Care 2011, 15:430  doi:10.1186/cc10231


See related research by Grant et al., http://ccforum.com/content/15/1/R37

Published: 1 June 2011

First paragraph (this article has no abstract)

Electrical impedance tomography has become a tool for monitoring regional ventilation. Interest is growing to derive additional information on pulmonary perfusion and ventilation/perfusion distribution. Since signals recorded by electrical impedance tomography also contain cardiac-related impedance changes, attempts are made to evaluate them in view of perfusion. Recently in Critical Care a corresponding study applying an advanced filtering technique for separating cardiac signals from the dominant ventilation component was published [1]. The quality of the concept is demonstrated by comparing the results with solitary cardiac signals during breath-hold.