Short-Term Hemodynamic Variability in Supine and Tilted Position in Young Men

  • Gerard CybulskiEmail author
  • Edward Koźluk
  • Agnieszka Piątkowska
  • Ewa Michalak
  • Anna Stępniewska
  • Anna Gąsiorowska
  • Wiktor Niewiadomski
Conference paper
Part of the IFMBE Proceedings book series (IFMBE, volume 76)


The aim of the study was to evaluate short-term changes in hemodynamic parameters observed in supine and tilted positions in six young men (age: 21–25). The cardiac inter-beat interval (RR), stroke volume (SV), ejection time (ET) and pre-ejection period (PEP) parameters were followed over two six-minute periods, in supine position and 10 min after a 60-degree head-up tilting maneuver, using continuously recorded impedance cardiography (ICG) and electrocardiography (ECG) signals. Hemodynamic variability was evaluated using coefficient of variation (CV), standard deviation (SD), and quartile deviation (QD). For the supine position, the mean (M), SD, CV and QD of the observed parameters were as follows. SV: 79 ml, 16 ml, 20%, 15 ml. RR: 905 ms, 106 ms, 12%, 163 ms. ET: 308 ms, 29 ms, 10%, 33 ms. PEP: 105 ms, 19 ms, 18%, 28 ms. In the tilted position, the following were observed. SV: 54 ml, 12 ml, 21%, 15 ml. RR: 706 ms, 68 ms, 10%, 68 ms. ET: 259 ms, 38 ms, 14%, 28 ms. PEP: 123 ms, 13 ms, 12%, 15 ms. The changes in hemodynamic variability caused by tilting were not unidirectional.


Hemodynamic variability Impedance cardiography Tilt test 



The study was supported by the research programs of institutions the authors are affiliated with.


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Authors and Affiliations

  1. 1.Institute of Metrology and Biomedical Engineering, Department of MechatronicsWarsaw University of TechnologyWarsawPoland
  2. 2.Second Chair and Department of CardiologyMedical University of WarsawWarsawPoland
  3. 3.Cardinal Stefan Wyszynski Institute of CardiologyWarsawPoland
  4. 4.University of Mazovia in WarsawWarsawPoland
  5. 5.Department of Applied PhysiologyMossakowski MRC, PASWarsawPoland

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