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PPG signal quality assessment and heart rate estimation
Vargová, Enikö ; Vítek, Martin (referee) ; Němcová, Andrea (advisor)
This work deals with photoplethysmographic (PPG) signals, their processing, quality assessment, estimation of heart rate from PPG signals and the ability to record biological signals with smartphones. The aim of this work is to record PPG signals using a smartphone and reference ECG signals using an ECG recorder. The work also includes the design of two algorithms, one for signal quality assessment and the other for heart rate estimation from PPG signals.
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Effect of stress on pilot performance
Dedinský, Miroslav ; Zikmund, Pavel (referee) ; Šplíchal, Miroslav (advisor)
The main goal of this diploma thesis is to find out whether it is possible to measure stress during piloting. If so, it would be possible to develop systems that could help pilots in stressful situations and thus alleviate the stress, this would have great impact and possitively improve work performance. There are few similar studies in the field, the stress factors that affect the pilots and what physiological changes are observable in such situations. Finally, an experimental measurement is performed during three flights, which is aimed to demonstrate the information obtained and thus the possibility of measuring stress and the metod to do so.
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Cardiotachometer
Čech, Jakub ; Sekora, Jiří (referee) ; Čech, Petr (advisor)
Master’s thesis deals with theme of heartbeats. Monitoring and evaluation of heartbeat is important for diagnostician cardiac dysfunction. First part of thesis is focused on anatomical description of heart and his operation. Another part is description of electrical activity of the heart and methods of capture. There is also mention of the cardiac rhythm and its disorders. One of the principal objective of this thesis is to study methods for sensing heart rate. These methods are analyzed and then selected a particular method for further solutions. The core thesis is to design functional cardiotachometer. Cardiotachometer derives the heart rate signal from phonocardiographical signal, which is acoustic manifestation of heart. Implementation takes place in the Labview, which is graphical programming environment. Suggested the device measures the current and average heart rate and the addition of HRV analysis in time domain.
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HRV analysis in the context of daily activities
Indrák, Václav ; Smital, Lukáš (referee) ; Novotná, Petra (advisor)
The aim of this bachelors thesis is to measure ECG recordings on voulenteers, and following analysis of HRV from these recordings. It persues the explanation of basic metrics used to evaluate HRV, used both in clinical and scientific practice and their following programming implementation in Matlab environment to achieve the most accurate results possible, which are than assessed.
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Methods for the evaluation of heart rate and arterial blood pressure variability
Sedláčková, Gabriela ; Halámek, Josef (referee) ; Leinveber, Pavel (advisor)
The bachelor thesis deals with methods for description of heart rate variability and arterial blood pressure. An important mechanism for maintaining homoeostasis in the body is so called baroreflex feedback loop, which allows for a short-term regulation of blood pressure. The thesis contains description of methods which are currently used for baroreflex sensitivity evaluation. Analysis in time domain as well as in frequency domain was done using programs in Matlab environment. At the end of the thesis the influence of ventricular extrasystoles on output parameter is evaluated.
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Heart rate changes during walking and running
Smolinský, Dominik ; Kozumplík, Jiří (referee) ; Kolářová, Jana (advisor)
This bachelor thesis is concerned with monitoring dynamic changes in heart rate during walking and running. The heart rate is calculated from the QRS complexes of the ECG signal. The aim of this thesis is to summarize the theoretical knowledge and then make measurements of individuals from 2 groups, fit athletes and less fit athletes. Thus, the theoretical part is discussed first, where all the information regarding the cardiovascular system, heart rate and HRV are described. The second part of the thesis is practical and deals with specific measurements, their processing and statistic analysis. It also describes the basic equipment and measurement protocol.
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ECG Biofeedback
Macková, Pavlína ; Kolářová, Jana (referee) ; Sekora, Jiří (advisor)
The master’s thesis is focused on the possibilities of measuring heart rate of ECG signal and its use in therapeutic game of ECG biofeedback. This thesis describes the way of measuring ECG with acquisition unit Biopac and analyzes signal processing for measurement of heart rate – algorithms of QRS detection, HRV analysis. Realisation of therapeutic is designed for applications in Matlab.
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Measurement and analysis of ECG signal
Černohous, Lukáš ; Vítek, Martin (referee) ; Harabiš, Vratislav (advisor)
In the first part, this thesis focuses on theoretical knowledge about ECG signal generation, its measuring and filtration. Furthermore it examines the R-wave as the most significant portion of the QRS Complex, describes the LabVIEW environment and the Vernier LabPro interface. The second part of the thesis then shows one of the possible ways of the R-wave detection and the subsequent heart rate measurement, which is then implemented by a program designed in LabVIEW environment. In the conclusion, the results of the thesis are evaluated.
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Physiological Data to Analyze and Improve the User Experience
Štěpánek, Daniel ; Beran, Vítězslav (referee) ; Materna, Zdeněk (advisor)
The goal of this thesis is to obtain dataset of physiological data for user emotions in order to analyze and improve human-computer interaction. This paper proposes of the use Empatica wristband to capture physiological data and Python for data processing. After evaluation, 94 % of intact data was obtained from the expected number of samples. Based on the obtained data, it is possible to better analyze the user experience and thus improve it.
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Heart rate measurement
Danielová, Tereza ; Veselý, Petr (referee) ; Chmelař, Milan (advisor)
Bachelor’s thesis deals with measurement of heart rate, its monitoring and evaluation which is relevant for the diagnosis of cardiac dysfunction. The first part describes the anatomy of heart and its activity. In the next part is further mention of the heart rhythm and its disorders. In the bachelor thesis is described several methods that are used in the evaluation of heart rate. The next part deals with the description of the device for scanning heart rate and description of the virtual instruments in LabVIEW.
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