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Intra-Aortic Balloon Counterpulsation
Žbánková, Alena ; Tannenberg,, Milan (referee) ; Sekora, Jiří (advisor)
The thesis is concerned with intraaortic balloon counterpulsation, which serves as a supporting method for the operation of failing heart. In the teoretical part is described principle of this method, its effects and the basic indications and contraindications of using. In the practical part of this work is proposed method for detecting triggering points realized in graphical program LabVIEW. The program outputs are detected ends of T wave for balloon inflation and R wave for its deflation.
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A Detections and Measurements in ECG Signals
Toušek, Vojtěch ; Vítek, Martin (referee) ; Kozumplík, Jiří (advisor)
Automatic detection and delineation of ECG characteristic points is a basic procedure of any analyze of ECG using computer. This detection is a necessary step to simplify the work of cardiologists to evaluate long ECG records. In this thesis is proposed and evaluate a method of detection and delineation in a single-lead ECG using dyadic wavelet transform followed by correction in pseudo-orthogonal lead system taken from standard 12-lead system. The method uses information about position of positive maximum – negative minimum pair to detect ECG characteristic waves. At first the QRS complex is detected and than its morphology (waves Q and S) and the onset and end of the complex. After that the T-wave is detected and delineated within a searching window dependent on QRS position. And last the P-wave is detected and delineated. There are used two types of wavelets in developed method, “haar” and “quadratic spline”. The developed method was evaluated on CSE database. When haar wavelet was used the QRS detector sensitivity was 99.14%. In the work is also evaluated the accuracy of delineation characteristic points. As the P-wave and QRS complex delineation produced quite good results the T-wave end delineator produced relatively big deviations. All deviations are presented in histograms.
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Detection of the repolarization parameters from ECG
Brandejs, Jakub ; Halámek, Josef (referee) ; Veselý, Petr (advisor)
A T wave peak and offset detector based on an unpublished lead transformation that can be briefly described as multilead linear regression was proposed and implemented afterwards. Potential of the transformation as a useful QRS detection tool was revealed later on. Proposed QRS detector was put to the test of CSE database. Results were compared with work of other authors. Results of T wave peak and offset detector were introduced in visual way.
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Optimal detection of the Twave end in ECG signals
Lorenc, Patrik ; Kozumplík, Jiří (referee) ; Vítek, Martin (advisor)
This work deals with the optimal detection of the T wave end in ECG signals, which uses the method of wavelet transform. Method of wavelet transform is now used quite a lot, because in practice it achieves good results. The aim of this work is a general introduction to ECG signal, wavelet transforms, and also with the method and realization of the T wave end detection.
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Optimal detection of the Twave end in ECG signals
Lorenc, Patrik ; Kozumplík, Jiří (referee) ; Vítek, Martin (advisor)
This work deals with the optimal detection of the T wave end in ECG signals, which uses the method of wavelet transform. Method of wavelet transform is now used quite a lot, because in practice it achieves good results. The aim of this work is a general introduction to ECG signal, wavelet transforms, and also with the method and realization of the T wave end detection.
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Optimal detection of the Twave end in ECG signals
Lorenc, Patrik ; Kozumplík, Jiří (referee) ; Vítek, Martin (advisor)
This work deals with the optimal detection of the T wave end in ECG signals, which uses the method of wavelet transform. Method of wavelet transform is now used quite a lot, because in practice it achieves good results. The aim of this work is a general introduction to ECG signal, wavelet transforms, and also with the method and realization of the T wave end detection.
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Detection of QT interval in ECG using first and second derivative
Rybár, Andrej ; Smital, Lukáš (referee) ; Chrobák, Martin (advisor)
This bachelor´s thesis deals with QT interval measurement and detection. The thesis starts with problematic of ECG signal delineation and its methods of detection of QT interval using first and second derivate. Next part of the work describes QRS complex detector. For this detection it is suitable to use detector based on the Pan-Tompkins algorithm. Next in practical part of the work is described algorithm of the detection of QT interval using first and second derivate. Selected algotithm was evaluated on the standard CSE database. Detected positions were compared with reference values. Result of this work is evaluation of results.
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Intra-Aortic Balloon Counterpulsation
Žbánková, Alena ; Tannenberg,, Milan (referee) ; Sekora, Jiří (advisor)
The thesis is concerned with intraaortic balloon counterpulsation, which serves as a supporting method for the operation of failing heart. In the teoretical part is described principle of this method, its effects and the basic indications and contraindications of using. In the practical part of this work is proposed method for detecting triggering points realized in graphical program LabVIEW. The program outputs are detected ends of T wave for balloon inflation and R wave for its deflation.
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|
|
Optimal detection of the Twave end in ECG signals
Lorenc, Patrik ; Kozumplík, Jiří (referee) ; Vítek, Martin (advisor)
This work deals with the optimal detection of the T wave end in ECG signals, which uses the method of wavelet transform. Method of wavelet transform is now used quite a lot, because in practice it achieves good results. The aim of this work is a general introduction to ECG signal, wavelet transforms, and also with the method and realization of the T wave end detection.
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Detection of the repolarization parameters from ECG
Brandejs, Jakub ; Halámek, Josef (referee) ; Veselý, Petr (advisor)
A T wave peak and offset detector based on an unpublished lead transformation that can be briefly described as multilead linear regression was proposed and implemented afterwards. Potential of the transformation as a useful QRS detection tool was revealed later on. Proposed QRS detector was put to the test of CSE database. Results were compared with work of other authors. Results of T wave peak and offset detector were introduced in visual way.
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