Persons at STU
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Basic information about a final thesisAdditional informationAdditional information about the final thesis follows. Click on the language link to display the information in the desired language.
|Language of final thesis:||English|
|Title of the thesis:||Digital Signal Detection Methods for ECG Signals Oscillations|
|Summary:||T-wave alternans represent most frequently reported modality of the electrical oscillations in ECG signal that have been studied during past decades in connection to vulnerability to dangerous arrhythmias and sudden cardiac death risk stratification. The published works as well as experimental results show evidence that not only alternating pattern, but also more complex oscillation can be observed in ECG signal. Detection methods for such general oscillation, however, were not yet elaborated by researchers. Development of methods especially addressed to detection of general oscillation in ECG morphology constitutes one of leading topic of the dissertation. Proposed methods are studied theoretically in ROC curve framework and applied on ECG signal recorded on isolated rat heart. Oscillation in morphology of ECG waves is referred as generalized alternans in this work. Two approaches were proposed for detection of generalized alternans: subsequence and whole-sequence methods. Time domain and frequency domain methods were studied in the work and evaluated in terms of detection performance. The proposed spectral method was applied on isolated rat heart ECG signal. When comparing isolated rat heart to human ECG, some specific features of rat ECG signal make detection more difficult but others features facilitate detection.|
|Key words:||ROC curve, signal detection, T-wave alternans|
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