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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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ECG measurement and processing in LabView
Veselý, Petr ; Kozumplík, Jiří (referee) ; Kolář, Radim (advisor)
The thesis, as its title shows, is focused on the ECG signal processing and the QRS complex detection. Its first part provides the anatomical description of the heart itself. Due to the irritation of the heart muscle, the atrium of the heart and the ventricles gradually contract and relax. In these stages, it is possible to measure a certain electric activity of the heart. This is called the ECG. The curve consists of several distinctive waves, the R wave being prevalent among them. Its parameters are predominant for describing the heart activity. Therefore, the next part of the thesis turns to the possibilities of its detection. The detection process is divided in two parts, the first of them being the pre-processing. Here, the signal is arranged in the right shape. This is followed by the detection, which describes the R wave occurrence. These operations use various filters and methods, as described in the following chapters. The output program, designed in the Labview programming environment, is based on the separation of the R wave from the ECG. This is subsequently compared to the threshold value. The values measured here are later used for the heart rate calculation and creating the geometrical description of the HRV
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Analysis of measured parameters of the cardiovascular system
Lysoň, Jakub ; Vítek, Martin (referee) ; Kratochvíla, Jiří (advisor)
This bachelor thesis talks about the measurement of heart electrical activity by twelve lead ECG. The diagnostic system Biopac is used for measurement, featured by the computer program Acqknowledge. The own authentic method is designed to detect effect of load on increasing in blood pressure and heartbeat. Using a statistical procedure for testing hypotheses in this area the measurement results will be evaluated. For the analysis of measured data in time and frequency domain was used program Matlab, in which the measured results were imported. It was created functions that are implemented in an medium of Guide to the graphic design program.
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Vectorcardograms - long term signals
Sedlář, Martin ; Janoušek, Oto (referee) ; Kolářová, Jana (advisor)
This project deals with anatomy and electrophysiology of heart. It describes the structure of cardiac muscle, mechanism of myocard's contraction, heart work, the origin and registration of electric signals of heart – electrocardiogram (ECG) and vectorcardiogram (VCG). Part of the work is design and creation of a software application for calculation and graphical presentation of vectorcardograms, useful for experimental data available on ÚBMI VUT in Brno.
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Artificial heart valves
Ruzsík, Erik ; Kůrečka, Jan (referee) ; Šedivý, Dominik (advisor)
The topic of this bachelor thesis is artificial heart valves and it contains some specific features of the cardiovascular system. Furthermore, it deals with the rheology of blood, summarises the types of artificial heart valves used and values their advantages and disadvantages. Its main goal is to determine the pressure drop on a real mechanical heart valve. The practical part consists of an experiment in the OFIVK laboratory. The achieved results are assessed in the conclusion of the thesis.
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MRI of Rats - Quantification of T1 in Myocardium
Vitouš, Jiří ; Mézl, Martin (referee) ; Jiřík, Radovan (advisor)
This thesis focuses on cardiac imaging and quantification of T1 relaxation time in rat hearts. Its main focus is to investigate available methods for such quantification and their application in the development of quantification tools. The large impact is given to methods of acquisition synchronization, mainly with respect to cardiac motion and breathing using retrospective gating, where the navigator signal is obtained solely from the acquired data, so without any external equipment such as the ECG or respiratory sensors. This paper takes into account situations where steady-state has been reached and also those where it has not, by means of contrast agent injection or by inversion pulses.
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Detection of pathologies in ECG signals
Němec, Radek ; Mézl, Martin (referee) ; Kašpar, Jakub (advisor)
This thesis attempts with methods for detection of pathologies in ECG signals. The first part is focused on the basic theory of heart anatomy, electrocardiography and individual heart pathologies. The second part describes the preprocessing of ECG signals, detection of QRS complexes and detection of individual pathologies. In the third part the detector is being tested on CSE database and my own measured data.
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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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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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Measurement and anaysis of electrocardiograms
Zimáková, Jana ; Hlaváč, Martin (referee) ; Kolářová, Jana (advisor)
The aim of my barchelor’s thesis was to become familiar with the methology of measurement of electrocardiographic signals, their description and subsequent analysis. During the measurement I used a computer system Biopac and program Matlab. The work is divided into three parts. The first part is focused on general problems of the heart activity, the generation, measurement and description of ECG curves. The second part is devoted to a description of the systém Biopac – recovery, procedure for the measurement and results measured sleep and stress ECG. The third part describes the actual processing of measured signals in Matlab.
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