| Measurement of heart sounds with EMFi transducer. | |
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MedLine Citation:
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PMID: 18002298 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A measurement system for heart sounds was implemented by using ElectroMechanical Film (EMFi). Heart sounds are produced by the vibrations of the cardiac structure. An EMFi transducer attached to the skin of the chest wall converts these mechanical vibrations into an electrical signal. Furthermore, the signal is amplified and transmitted to the computer. The data is analyzed with Matlab software. The low-frequency components of the measured signal (respiration and pulsation of the heart) are filtered out as well as the 50 Hz noise. Also the power spectral density (PSD) plot is computed. In test measurements, the signal was measured with respiration and by holding breath. From the filtered signal, the first (S1) and the second (S2) heart sound can be clearly seen in both cases. In addition, from the raw data signals the respiration frequency and the heart rate can be determined. In future applications, with the EMFi material it is possible to implement a plaster-like transducer measuring vital signals. |
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Authors:
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Satu Kärki; Minna Kääriäinen; Jukka Lekkala |
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Publication Detail:
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Type: Evaluation Studies; Journal Article |
Journal Detail:
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Title: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference Volume: 2007 ISSN: 1557-170X ISO Abbreviation: Conf Proc IEEE Eng Med Biol Soc Publication Date: 2007 |
Date Detail:
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Created Date: 2007-11-16 Completed Date: 2008-03-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101243413 Medline TA: Conf Proc IEEE Eng Med Biol Soc Country: United States |
Other Details:
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Languages: eng Pagination: 1683-6 Citation Subset: IM |
Affiliation:
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Measurement and Information Technology, Tampere University of Technology, P.O. Box 692, Tampere, FI-33101 Finland. satu.karki@tut.fi |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Equipment Design Equipment Failure Analysis Heart Auscultation / instrumentation*, methods Heart Sounds / physiology* Humans Manometry / instrumentation*, methods Reproducibility of Results Sensitivity and Specificity Sound Spectrography / instrumentation*, methods Transducers* Vibration |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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