caa a22 4500 465783716 CHVBK 20180323112002.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF02446142 doi (NATIONALLICENCE)springer-10.1007/BF02446142 Spectral analysis and acoustic transmission of mitral and aortic valve closure sounds in dogs [Elektronische Daten] Part 1 Modelling the heart/thorax acoustic system [L. Durand, Y. Langlois, T. Lanthier, R. Chiarella, P. Coppans, S. Carioto, S. Bertrand-Bradley] A system model based on the simultaneous recording and analysis of the intracardiac and thoracic phonocardiograms to estimate the time-varying properties of the heart/thorax acoustic system of the dog is described. The presence of instrumental noise in the recording of intracardiac phonocardiograms is characterised, and it is demonstrated that its effect on the estimate of the transfer and coherence functions of the system can be quantified and corrected. Application of the model to study the spectral characteristics and the acoustic transmission properties of the mitral component M1 of the first heart sound and of the aortic component A2 of the second heart sound in the dog shows that the heart/thorax acoustic system acts like a bandpass filter having a higher attenuation for A2 than for M1. Between 20 and 100 Hz, the mean attenuation of M1 is 30 dB while that of A2 is 46 dB. Above 100 Hz, the attenuation slope is—12 dB per octave for M1 and—6 dB per octave for A2. IFMBE, 1990 Aortic valve nationallicence Coherence function nationallicence Heart sounds nationallicence Heart/thorax acoustic system nationallicence Mitral valve nationallicence Modelling nationallicence Spectral analysis nationallicence Transfer function nationallicence Durand L. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pina Avenue, H2W 1R7, Montreat, Quebec, Canada aut Langlois Y. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pina Avenue, H2W 1R7, Montreat, Quebec, Canada aut Lanthier T. Department of Medicine, Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte Street, J2S 7C6, St-Hyacinthe, Quebec, Canada aut Chiarella R. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pina Avenue, H2W 1R7, Montreat, Quebec, Canada aut Coppans P. Department of Medicine, Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte Street, J2S 7C6, St-Hyacinthe, Quebec, Canada aut Carioto S. Department of Surgery, Hôtel-Dieu de Montréal Hospital, 8840 St-Urbain, H2W 1T8, Montreal, Quebac, Canada aut Bertrand-Bradley S. Medtronic of Canada, 1 Place du Commerce, Suite 170, Ile des Soeurs, H3E 1A2, Verdun, Quebec, Canada aut Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/4(1990-07-01), 269-277 0140-0118 28:4<269 1990 28 11517 https://doi.org/10.1007/BF02446142 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02446142 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Durand L. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pina Avenue, H2W 1R7, Montreat, Quebec, Canada aut NATIONALLICENCE 700 1- Langlois Y. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pina Avenue, H2W 1R7, Montreat, Quebec, Canada aut NATIONALLICENCE 700 1- Lanthier T. Department of Medicine, Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte Street, J2S 7C6, St-Hyacinthe, Quebec, Canada aut NATIONALLICENCE 700 1- Chiarella R. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pina Avenue, H2W 1R7, Montreat, Quebec, Canada aut NATIONALLICENCE 700 1- Coppans P. Department of Medicine, Faculty of Veterinary Medicine, University of Montreal, 3200 Sicotte Street, J2S 7C6, St-Hyacinthe, Quebec, Canada aut NATIONALLICENCE 700 1- Carioto S. Department of Surgery, Hôtel-Dieu de Montréal Hospital, 8840 St-Urbain, H2W 1T8, Montreal, Quebac, Canada aut NATIONALLICENCE 700 1- Bertrand-Bradley S. Medtronic of Canada, 1 Place du Commerce, Suite 170, Ile des Soeurs, H3E 1A2, Verdun, Quebec, Canada aut NATIONALLICENCE 773 0- Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/4(1990-07-01), 269-277 0140-0118 28:4<269 1990 28 11517 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465783155 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer