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Influence of patent ductus arteriosus and ventilators on electrical velocimetry for measuring cardiac output in very-low/low birth weight infants

Journal of Perinatology volume 35, pages 485–489 (2015)Cite this article

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Abstract

Objective:

We evaluated electrical velocimetry, a noninvasive method for continuous cardiac output measurement, in very-low and low birth weight infants and the influence of patent ductus arteriosus (PDA) and ventilators on this method.

Study design:

This prospective study compared 81 pairs of simultaneous cardiac output measurements by electrical velocimetry and transthoracic echocardiography in 28 patients. Data were compared by correlation, Bland–Altman analysis and two-way analysis of variance.

Results:

The two methods exhibited a high correlation (r=0.859, P<0.0001). The bias (mean difference of the methods) and percent error (100 × 1.96 × s.d./mean cardiac output) were −6 ml min−1 and 29.2%, respectively. PDA significantly affected the bias (P=0.0004), but ventilators did not (P=0.14). Hemodynamically significant PDA had a larger bias (−36 ml min−1) and higher percent error (38.6%).

Conclusions:

Although influenced by PDA, electrical velocimetry was generally interchangeable with transthoracic echocardiography even using ventilators.

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Authors and Affiliations

  1. Department of Neonatology, Niigata City General Hospital, Niigata, Japan

    T Torigoe, Y Nagayama, T Sato & H Yamazaki

  2. Department of Pediatrics, Niigata City General Hospital, Niigata, Japan

    S Sato

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  1. T Torigoe
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Correspondence to T Torigoe.

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Torigoe, T., Sato, S., Nagayama, Y. et al. Influence of patent ductus arteriosus and ventilators on electrical velocimetry for measuring cardiac output in very-low/low birth weight infants. J Perinatol 35, 485–489 (2015). https://doi.org/10.1038/jp.2014.245

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