Extraction of a low-amplitude component orthogonal to the recorded cardiac impulse
| Parent link: | Biology and Medicine Vol. 6, iss. 1.— 2014.— [BM-013-14, 5 p.] |
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| Other Authors: | , , , |
| Summary: | Title screen The problem of the cardiac signal extraction from a low-amplitude high-frequency component invisible on conventionalelectrocardiography (ECG) is considered. For this purpose, the original ECG model, which includes a highamplitudecomponent, a low-amplitude component, and random noise, is used. We have proposed the method toextract the orthogonal high-amplitude and low-amplitude components from the recorded cardiac pulse sequence inthe form of the first two components of the matrix singular decomposition composed of a set of cardiac pulses. Incontrast to Simson’s method, the proposed method does not assume cardiac signal averaging over a large (aboutseveral hundred cardiac pulses) sequence as well as the averaged signal filtering. The low-amplitude component isextracted from a short (about 10 s) ECG recording. We have used a mathematical model to examine the stability of theproposed method to the correlation of the high-amplitude and low-amplitude components of the cardiac signal as wellas to the influence of random noise. It is shown that the high-amplitude component is steadily extracted in the entirerange of the change in noise level and correlation of the regular components of the cardiac signal. At the same time,the low-amplitude component is significantly distorted when the pair correlation coefficient with the high-amplitudecomponent is greater than 0.2 or noise level is greater than 0.4. |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://www.biolmedonline.com/Articles/Vol6_1_2014/BM-013-14_Grigoriev.pdf |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=642286 |