NDLI: Identification of cardiac events by Optical Vibrocardiograpy: comparison with Phonocardiography

Content Provider	IEEE Xplore Digital Library
Author	De Melis, M. Morbiducci, U. Scalise, L.
Copyright Year	2007
Description	Author affiliation: Polytech. Univ. of Marche, Ancona (De Melis, M.; Morbiducci, U.; Scalise, L.)
Abstract	Laser Doppler vibrometry has been recently applied for non-contact monitoring of the cardiac activity, both in terms of cardiac rate and heart rate variability, measuring the velocity of the skin surface of the chest wall and the neck (optical vibrocardiography, VCG). To go further insight in the analysis of VCG recordings, in this study authors have compared heart sounds by digital phonocardiography (PCG) with the motion of the skin on the chest wall by optical VCG, the final aim being the identification of some events of cardiac mechanics in the VCG signals. PCG and VCG traces were synchronously recorded on 10 healthy subjects, along with ECG. To reach this goal, multiresolution analysis together with Hilbert transforms for envelope calculation on PCG and VCG have been applied, temporal and morphological features were extracted from the signals. Data collection and signal processing allowed us to identify some events of cardiac mechanics, correlating the heart sounds relative to the closure of the mitral valve, and the following closure of the aortic and pulmonary valve with characteristic deflections identifiable on VCG traces.
Starting Page	2956
Ending Page	2959
File Size	327676
Page Count	4
File Format	PDF
ISBN	9781424407873
ISSN	1557170X
DOI	10.1109/IEMBS.2007.4352949
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-22
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical signal processing Optical recording Skin Heart valves Heart rate measurement Heart rate variability Velocity measurement Surface morphology Surface emitting lasers Neck
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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