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Mobil system for monitoring of sports activity
Maleňák, Filip ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
The aim of this master’s thesis is to analyse methods that are used for monitoring athlete’s activities and a description of current technical solutions with a focus on heart rate and respiratory rate monitoring. The presented solution shows the possibilities of using available open source SW and HW technologies and their implementation in the design of an integrated tool for monitoring sports activities with the iOS operating system.
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Measurement and analysis of cardiovascular parameters
Filipová, Petra ; Smital, Lukáš (referee) ; Kratochvíla, Jiří (advisor)
This bachelor´s thesis illustrates the basic diagnostic procedures for ECG analysis in clinical practice. It contains the verification of statistical hypotheses, automatic detection of the RR intervals using three different QRS detectors and heart rate from the ECG und other analyses in time and frequency domain. The validation of detection efficiency is investigated. Heart rate variability analyses are shown in time and frequency domain too. Analyses are done in Matlab, the graphical interface in Maltab GUIDE was done too and includes all of the created functions in time and frequency domain. For the purpose of evaluation methods the real data were measured according to the created acquisition protocol.
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Scanning a analysing of heart electrical activity and blood pressure before and after the load
Vích, Daniel ; Kolářová, Jana (referee) ; Kratochvíla, Jiří (advisor)
The aim of bachelor’s thesis is familiarization with anatomy and physiology of heart, with setting to electrical activity, scanning EKG before and after the load with Biopac system, scanning of blood pressure before and after the load with auscultation, statistical analysis of acquired data and presentation of measured data in graphical interface Guide of Matlab system. According to the protocol of measurement, scanning of heart electrical activity with the Biopac system, and scanning of blood pressure, with auscultation, was realized before and after the load. Measured data was statistically analyzed with t-test to verify hypothesis, that there is an influence of the load on the watched parameters, and to show the process of statistical verification. Application of this method assumes normal distribution of data, that’s why data was at first tested by Chi-squared and Kolmogorov-Smirnov test to verify their normal distribution. In the next step data was imported into Matlab system. The presentation of measured data is realized in graphic interface Guide. The program contains time domain and spectral analysis, automatic detection of heart rate and analysis of heart rate variability.
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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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Relationship between breath and electrocardiogram
Hamerský, Jan ; Janoušek, Oto (referee) ; Kolářová, Jana (advisor)
The main goal of this thesis is to familiarize readers with the problem of influence on the cardiac cycle. Thesis analyzes necessary concepts to understand electrophysiology of heart, mechanisms affecting heart beats, respiratory identifides methods for detection of respiratory frequency presents in electrocardiogram, proposes own measurement protocol of the influence of respiratory rate on electrcardiogram, implements detection of respiratory rate of the measured records, compares the measured results
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Measurement of HRV and consideration of physical load
Vyskočilová, Martina ; Kolář, Radim (referee) ; Janoušek, Oto (advisor)
This work examines the influence of load on heart rate variability, and a description of the mechanisms influencing changes in heart rate, response to load. There is a review of methods used to assess heart rate variability. In another part the data of the measurement are processed and described the proposed method using spectral power, generated by the algorithm description, presentation of results.
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The Verification of the Use of the Heart Rate Variability in the Management of Training Process in Adolescent Mountain Bikers
KADLEC, Jakub
Cross-country Olympic (XCO) is one of the endurance sports. The training process of mountain bikers is very demanding because the rider must be complex in endurance and anaerobic skills. Alfa and omega of the training process is a periodization of training load and recovery. Heart rate variability (HRV) can help us assess body's condition and readiness for training. In the practical part of the work, an experiment was carried out, which was attended by eight adolescent mountain bikers. The intervention took place during the training camp. The total intervention time was four weeks. The participants were randomized into two groups. The first experimental group (ES) (n = 4) was a graduated training camp with a heart rate variability guided training load. The second group was a control group that used a classical predefined training plan. For evaluation of HRV training efficiency a VO2max test and 20 minutes time trial (20TT) on an ergometer were used. The results showed an improvement in mean power output during 20TT in the experimental group (PRE 303.5 W; POST 317.5 W) and relative values (PRE 4.58 W.kg-1; POST 4.68 W.kg-1). On the other hand, there were no changes in average power (PRE 308 W; POST 305.7 W) and relative values (PRE 4.20 W.kg-1; POST 4.20 W.kg-1). From a statistical point of view, there was no effect of HRV training on performance indicators (p <0.05). Our experiment failed to confirm the usefulness of HRV training for cyclists.
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Neuromodulation in heart failure
Naar, Jan ; Ošťádal, Petr (advisor) ; Rokyta, Richard (referee) ; Vízek, Martin (referee)
The prognosis of heart failure with reduced ejection fraction remains poor. Neurohumoral activation, including increased cardiac sympathetic nerve activity, plays an important role in the pathogenesis as well as disease progression. Recently, several neuromodulation strategies have been proposed that aim to directly affect the residual autonomic imbalance. Spinal cord stimulation is one of the proposed methods. In the clinical part of this project, we assessed the mid-term effect of spinal cord stimulation on cardiac sympathetic nerve activity and the acute effect on autonomic balance. In the total study population, we did not detect any changes in cardiac sympathetic nerve activity or heart rate variability. However, we observed that the patients with high baseline sympathetic nerve activity or low heart rate variability responded favourably to therapy, reflected in reduced cardiac sympathetic nerve activity and increased heart rate variability. Considering these results, we conducted an experimental study focused on the effect of acute severe heart failure on heart rate variability. In a porcine model of hypoxic myocardial dysfunction, we observed a significant reduction in heart rate variability in all parameters recorded. Our results indicate that spinal cord stimulation may improve autonomic...
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Examination of vegetative system in hereditary neuropathy
Jílková, Daniela ; Horáček, Ondřej (advisor) ; Kobesová, Alena (referee)
Aim: The aim of this thesis "Examination of vegetative system in hereditary neuropathy" is to consider the level of physical fitness, physical actvity level and quality of autonomic function in patients with hereditary neuropathy Charcot Marie Tooth and an assessment of interactions of these parameters, especially with regard to possible influence by the presence of autonomic neuropathy and with regard to neurological symptoms. Background: Although vegetative neuropathy was mentioned in the first publication about CMT, it is not widely discussed topic as part of it. Methods: Seventeen probands underwent spiroergometry, heart rate variability test, six minute walk test, rating by the CMT Neuropathy Score and Overall neuropathy disability scale and completing the IPAQ questionnaire. Results: We found symptoms of autonomic neuropathy in group of patients with CMT, especially high-frequency part of heart rate variability spectrum has a particularly significant decrease. Patients with autonomic neuropathy have shown a low fitness and functional capacity, tendency to obesity and hypertension. The observed correlation of autonomic neuropathy and neurological impairment was very weak. Conclusions: We find a neuropathy of the autonomic nervous system in patiens with hereditary motor and sensitive neuropathy...
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