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Evaluation of cardiac output by bioimpedance method with patients with pacemaker
Soukup, Ladislav ; Cimbálník, Jan (referee) ; Vondra, Vlastimil (advisor)
This thesis deals with the possibility of using impedance cardiography for calculating cardiac output. Kubicek’s, Sramek‘s and Sramek-Bernstein‘s methods are discussed here. These methods were applied to a data set, obtained by measuring on subjects with implanted cardiostimulators. The subjects’ heart rate was being changed by the programing of cardiostimulators. Thanks to this procedure the measured data were not affected by artifacts, connected with the heart rate change caused by a body stress, or other influences. An influence of heart rate on a cardiac output value based on the statistical processing of the data set was studied.
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Evaluation of pulse wave velocity in the human body
Mezuláníková, Radka ; Viščor,, Ivo (referee) ; Jurák, Pavel (advisor)
This Mater's thesis deals with the evaluation of pulse wave velocity using multi-channel whole-body impedance cardiography. Data were taken from the group of healthy volunteers whose impedance changes were measured during rest, respiratory maneuvers, tilt and stress exercise. The result of this measurement are values of peaks of pulse wave time shifts towards R-wave. The velocity values towards the thorax electrodes were recalculated on the basis of knowledge about the pulse wave time shifts and the distances from the heart to the scanned locations, which were measured using the arterial segment's lengths.
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Bioimpedance signal processing
Soukup, Ladislav ; Kolářová, Jana (referee) ; Provazník, Ivo (advisor)
The aim of this thesis is a study of impedance cardiography and its subsequent use in determining the cardiac output. The calculation in this work uses three default types of biological signals: the ECG signal to gallop and the impedance cardiography. There are identified the necessary parameters of the signals, especially heart rate, heart sounds (S1,S2) and the derivative impedance cardiography. This method of determining cardiac output is non-invasive and is easy to perform for doctor and patient, which is very important for risky patient especialy. Disadvantage is imprecision, that is eliminated by modifying the algorithm of the calculation. User interface for processing all the necessary signals and the subsequent calculation of cardiac output was implemented in MATLAB programming environment and is optimized for data measured and processed in the ISI ASCR.
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Bioimpedance signal processing
Soukup, Ladislav ; Kolářová, Jana (referee) ; Provazník, Ivo (advisor)
The aim of this thesis is a study of impedance cardiography and its subsequent use in determining the cardiac output. The calculation in this work uses three default types of biological signals: the ECG signal to gallop and the impedance cardiography. There are identified the necessary parameters of the signals, especially heart rate, heart sounds (S1,S2) and the derivative impedance cardiography. This method of determining cardiac output is non-invasive and is easy to perform for doctor and patient, which is very important for risky patient especialy. Disadvantage is imprecision, that is eliminated by modifying the algorithm of the calculation. User interface for processing all the necessary signals and the subsequent calculation of cardiac output was implemented in MATLAB programming environment and is optimized for data measured and processed in the ISI ASCR.
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Evaluation of pulse wave velocity in the human body
Mezuláníková, Radka ; Viščor,, Ivo (referee) ; Jurák, Pavel (advisor)
This Mater's thesis deals with the evaluation of pulse wave velocity using multi-channel whole-body impedance cardiography. Data were taken from the group of healthy volunteers whose impedance changes were measured during rest, respiratory maneuvers, tilt and stress exercise. The result of this measurement are values of peaks of pulse wave time shifts towards R-wave. The velocity values towards the thorax electrodes were recalculated on the basis of knowledge about the pulse wave time shifts and the distances from the heart to the scanned locations, which were measured using the arterial segment's lengths.
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Evaluation of cardiac output by bioimpedance method with patients with pacemaker
Soukup, Ladislav ; Cimbálník, Jan (referee) ; Vondra, Vlastimil (advisor)
This thesis deals with the possibility of using impedance cardiography for calculating cardiac output. Kubicek’s, Sramek‘s and Sramek-Bernstein‘s methods are discussed here. These methods were applied to a data set, obtained by measuring on subjects with implanted cardiostimulators. The subjects’ heart rate was being changed by the programing of cardiostimulators. Thanks to this procedure the measured data were not affected by artifacts, connected with the heart rate change caused by a body stress, or other influences. An influence of heart rate on a cardiac output value based on the statistical processing of the data set was studied.
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Porovnání metod pro výpočet srdečního výdeje ze signálu impedanční kardiografie
Jurák, Pavel ; Halámek, Josef ; Vondra, Vlastimil ; Kára, T. ; Nykodým, J. ; Číp, Ondřej ; Eisenberger, M. ; Leinveber, P. ; Fráňa, P. ; Meluzín, J. ; Souček, M.
The goal of the study is to compare various methods of non-invasive stroke volume (SV) assessment from a raw impedance cardiography (IC) signal. IC detects changes in cardiac haemodynamic function using thoracic electrical bioimpedance technology. Corresponding changes of impedance are used along with ECG and blood pressure to measure and calculate haemodynamics parameters
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