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Proceedings Paper

Computer program for analysis of hemodynamic response to head-up tilt test
Author(s): Eliza Świątek; Gerard Cybulski; Edward Koźluk; Agnieszka Piątkowska; Wiktor Niewiadomski
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Paper Abstract

The aim of this work was to create a computer program, written in the MATLAB environment, which enables the visualization and analysis of hemodynamic parameters recorded during a passive tilt test using the CNS Task Force Monitor System. The application was created to help in the assessment of the relationship between the values and dynamics of changes of the selected parameters and the risk of orthostatic syncope. The signal analysis included: R-R intervals (RRI), heart rate (HR), systolic blood pressure (sBP), diastolic blood pressure (dBP), mean blood pressure (mBP), stroke volume (SV), stroke index (SI), cardiac output (CO), cardiac index (CI), total peripheral resistance (TPR), total peripheral resistance index (TPRI), ventricular ejection time (LVET) and thoracic fluid content (TFC). The program enables the user to visualize waveforms for a selected parameter and to perform smoothing with selected moving average parameters. It allows one to construct the graph of means for any range, and the Poincare plot for a selected time range. The program automatically determines the average value of the parameter before tilt, its minimum and maximum value immediately after changing positions and the times of their occurrence. It is possible to correct the automatically detected points manually. For the RR interval, it determines the acceleration index (AI) and the brake index (BI). It is possible to save calculated values to an XLS with a name specified by user. The application has a user-friendly graphical interface and can run on a computer that has no MATLAB software.

Paper Details

Date Published: 25 November 2014
PDF: 12 pages
Proc. SPIE 9290, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2014, 92901M (25 November 2014); doi: 10.1117/12.2074700
Show Author Affiliations
Eliza Świątek, Warsaw Univ. of Technology (Poland)
Gerard Cybulski, Warsaw Univ. of Technology (Poland)
Mossakowski Medical Research Ctr. (Poland)
Edward Koźluk, Medical Univ. of Warsaw (Poland)
Agnieszka Piątkowska, Medical Univ. of Warsaw (Poland)
Wiktor Niewiadomski, Mossakowski Medical Research Ctr. (Poland)


Published in SPIE Proceedings Vol. 9290:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2014
Ryszard S. Romaniuk, Editor(s)

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