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Intensive Care Medicine

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01-06-2012 | Pediatric Original

Electrical velocimetry as a tool for measuring cardiac output in small infants after heart surgery

Authors: Oswin Grollmuss, Serge Demontoux, André Capderou, Alain Serraf, Emre Belli

Published in: Intensive Care Medicine | Issue 6/2012

Abstract

Purpose

Cardiac output (CO), the product of stroke volume (SV) and heart rate, is essential to guarantee organ perfusion, especially in the intensive care setting. As invasive measurement of CO bears the risk of complications there is a need for non-invasive alternatives. We investigated if electrical velocimetry (EV) and transthoracic Doppler (Doppler-TTE) are interchangeable for the non-invasive measurement of SV and able to reflect the post-surgical SV/CO trend.

Methods

Comparison of SV measurements by EV and Doppler-TTE was performed in 24 newborns after switch operation (n = 240 measurements). Three subgroups of measurements (=periods) were created according to the patients’ status in the course of post-surgical CO recovery.

Results

Bland–Altman analysis found acceptable bias and limits of agreement for the interchangeability of the two methods. Mean overall SV was 3.7 ml with a mean overall bias of 0.28 ml (=7.6 %). The mean percentage error of 29 % was acceptable according to the method of Critchley and Critchley. Overall precision expressed by the coefficient of variation (CV) was 6.6 % for SV_TTE and 4.4 % for SV_EV. SV_TTE and SV_EV medians in the three periods were significantly different and documented the post-surgical CO trend.

Conclusions

EV and Doppler-TTE are interchangeable for estimating SV. EV has the advantages of easy handling and allows continuous measurement.

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Title: Electrical velocimetry as a tool for measuring cardiac output in small infants after heart surgery
Authors: Oswin Grollmuss
Serge Demontoux
André Capderou
Alain Serraf
Emre Belli
Publication date: 01-06-2012
Publisher: Springer-Verlag
Published in: Intensive Care Medicine / Issue 6/2012
Print ISSN: 0342-4642
Electronic ISSN: 1432-1238
DOI: https://doi.org/10.1007/s00134-012-2530-3

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Electrical velocimetry as a tool for measuring cardiac output in small infants after heart surgery

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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