caa a22 4500 46578383X CHVBK 20180323112002.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02441966 doi (NATIONALLICENCE)springer-10.1007/BF02441966 Spectral analysis and acoustic transmission of mitral and aortic valve closure sounds in dogs [Elektronische Daten] Part 3 Effects of altering heart rate and P-R interval [L. Durand, Y. Langlois, T. Lanthier, R. Chiarella, P. Coppens, S. Carioto, S. Bertrand-Bradley] A surgical protocol was designed to implant, in seven dogs, a programmable sequential atrioventricular pacemaker after destruction of the bundle of His to produce a chronic heart block. The heart rate and P-R interval were then varied independently and their influence on the spectra and acoustic transmission of the mitral M1 and aortic A2 valve closure sounds was studied. Results indicate that the major effects of varying the P-R interval are a strong change in the intensity of M1 and modifications of its acoustic transmission across the heart/thorax acoustic system. No similar influence is observed on the intensity and acoustic transmission of A2. Varying the heart rate has a small effect of the intensity of M1 but none on the intensity of A2. In addition, changes in either the P-R interval or the heart rate do not seem to modify the spectral profile of the intracardiac and thoracic M1 and A2 components. IFMBE, 1990 Aortic valve nationallicence Heart rate nationallicence Heart sounds nationallicence Heart/thorax acoustic system nationallicence Mitral valve nationallicence P-R interval nationallicence Spectral analysis nationallicence A2 : aortic component of the second heart sound nationallicence A2 ao : aortic component recorded within the aorta at the aortic root nationallicence A2 aa : aortic component recorded on the body surface at the aortic area nationallicence dP/dt : time derivative of the pressure wave in mm Hgs−1 nationallicence dP/dt max : maximum value of the time derivative of the pressure wave in mm Hg s−1 nationallicence dP/dt min : minimum value of the time derivative of the pressure wave (or maximum negative value) in mm Hg s−1 nationallicence ECG : electrocardiogram nationallicence M1 : mitral component of the first heart sound nationallicence M1 lv : mitral component recorded within the left ventricle nationallicence M1 a : mitral component recorded on the body surface at the apex of the heart nationallicence PCG : phonocardiogram nationallicence P2 : pulmonary component of the second heart sound nationallicence S1 : first heart sound nationallicence S2 : second heart sound nationallicence T1 : tricuspid component of the first heart sound nationallicence Durand L. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pine Avenue, H2W 1R7, Montreal, Quebec, Canada aut Langlois Y. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pine Avenue, H2W 1R7, Montreal, 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 Pine Avenue, H2W 1R7, Montreal, Quebec, Canada aut Coppens 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, 3840 St-Urbain, H2W 1T8, Montreal, Quebec, 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 28/5(1990-09-01), 431-438 0140-0118 28:5<431 1990 28 11517 https://doi.org/10.1007/BF02441966 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02441966 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Durand L. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pine Avenue, H2W 1R7, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Langlois Y. Laboratory of Biomedical Engineering, Clinical Research Institute of Montreal, University of Montreal, 110 West Pine Avenue, H2W 1R7, Montreal, 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 Pine Avenue, H2W 1R7, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Coppens 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, 3840 St-Urbain, H2W 1T8, Montreal, Quebec, 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 28/5(1990-09-01), 431-438 0140-0118 28:5<431 1990 28 11517 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465783155 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer