Orthogonal subspace projection based framework to extract heart cycles from SCG signal
| Autor: | Laxmi Sharma, Manas Kamal Bhuyan, Tilendra Choudhary |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
business.industry
Computer science 0206 medical engineering Health Informatics Pattern recognition 02 engineering and technology 020601 biomedical engineering Signal 03 medical and health sciences 0302 clinical medicine Feature (computer vision) Signal Processing Heart rate variability Artificial intelligence High-pass filter business Projection (set theory) Closing (morphology) 030217 neurology & neurosurgery Subspace topology Smoothing |
| Zdroj: | Biomedical Signal Processing and Control. 50:45-51 |
| ISSN: | 1746-8094 |
| DOI: | 10.1016/j.bspc.2019.01.005 |
| Popis: | Early diagnosis and prediction of heart diseases are essential to reduce the cardiac risks. Change in heart cycle morphologies is a vital diagnostic feature for cardiac clinical systems. A seismocardiogram (SCG) signal provides more detailed information of different cardiac phases in a heart cycle compared to other cardiac signals. Hence, heart cycle extraction using SCG is very important to examine cardiac activities. In this manuscript, an orthogonal subspace projection based framework is proposed to extract heart cycles from a SCG signal. The heart cycle is estimated by calculating intervals between consecutive aortic valve opening (AO) instants, and post aortic valve closing (postAC) instants. Orthogonal subspace projection is applied to the SCG signal on ECG subspace for AO peak detection. The signal generated from projection gives the locations of AO peaks in the SCG signal. The postAC peaks are determined on intervals between consecutive AO peaks using segmentation, FIR based smoothing, Butterworth high pass filtering, and finding maxima point. The performance of the proposed method is evaluated using SCG signals from CEBS database, publicly available at Physionet archive. The performance results show that the proposed method produces an acceptable detection rate with a minimal detection error. The evaluation results of the proposed method show its extendibility in heart rate variability analysis and hemodynamic parameter extraction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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