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Stroke volume and systolic time intervals: Beat-to-beat comparison between echocardiography and ambulatory impedance cardiography in supine and tilted positions

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Abstract

The aim of the study was to compare stroke volume (SV), ejection time (ET) and pre-ejection period (PEP) measurements obtained using a central haemodynamics ambulatory monitoring device based on impedance cardiography (ICG), in supine and tilted positions (60°), with pulsed Doppler echocardiography as a noninvasive reference method. The Holter-type ICG device was used for off-line, beat-to-beat, automatic determination of SV, ET and PEP. ICG data were compared with those obtained simultaneously using pulsed Doppler echocardiography in the ascending aorta from a suprasternal projection, 1 min before and 10 min after tilting. The tests were performed in 13 young, healthy subjects (six men and seven women, aged 23–33 years). Linear regression between the measured values obtained for all subjects was described by the following formulas: SVicg=13.9+0.813*SVecho (r=0.857 SEE=9.03, n=496), ETicg=16.8+0.987*ETecho (r=0.841, SEE=21.3, n=496), PEPicg=22.8+0/890*PEPecho (r=0.727, SEE=14.6, n=496). The data showed that ambulatory impedance cardiography gives useful absolute values of SV and systolic time intervals measured in supine and tilted positions.

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Authors and Affiliations

  1. Department of Applied Physiology, Medical Research Centre, Warsaw, Poland

    G. Cybulski & W. Niewiadomski

  2. Department of Noninvasive Cardiology, Institute of Cardiology, Warsaw, Poland

    E. Michalak, E. Koźluk & A. Piątkowska

  3. 1st Chair and Department of Cardiology, Medical University of Warsaw, Poland

    E. Koźluk

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  1. G. Cybulski
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  2. E. Michalak
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  3. E. Koźluk
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  4. A. Piątkowska
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  5. W. Niewiadomski
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Correspondence to G. Cybulski.

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Cybulski, G., Michalak, E., Koźluk, E. et al. Stroke volume and systolic time intervals: Beat-to-beat comparison between echocardiography and ambulatory impedance cardiography in supine and tilted positions. Med. Biol. Eng. Comput. 42, 707–711 (2004). https://doi.org/10.1007/BF02347554

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  • DOI: https://doi.org/10.1007/BF02347554

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