caa a22 4500 46578366X CHVBK 20180323112002.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF02446145 doi (NATIONALLICENCE)springer-10.1007/BF02446145 Estimation of arterial compliance in aortic regurgitation: three methods evaluated in pigs [Elektronische Daten] [S. Slørdahl, H. Piene, J. Solbakken, O. Rossvoll, S. Samstad, B. Angelsen] Three methods for measuring arterial compliance when aortic regurgitation is present are examined. The first two methods are based on a Windkessel model composed of two elements, compliance C and resistance R. Arterial compliance was estimated from diastolic pressure waveforms and diastolic regurgitant flow for one method, and from systolic aortic pressure waveforms and systolic flow for the other method. The third method was based on a three-element Windkessel model, composed of characteristic resistance r, compliance C and resistance R. In this method arterial compliance was calculated by adjusting the model to the modulus and phase of the first harmonic term of the aortic input impedance. The three methods were compared and validated in six anaesthetised pigs over a broad range of aortic pressures. The three methods were found to give quantitatively similar estimates of arterial compliance at mean aortic pressures above 60 mm Hg. Below 60 mm Hg, estimates of arterial compliance varied widely, probably because of poor validity of the Windkessel models in the low pressure range. IFMBE, 1990 Aortic regurgitation nationallicence Arterial compliance nationallicence Fourier analysis nationallicence Impedance nationallicence Mean aortic pressure nationallicence Peripheral resistance nationallicence Windkessel model nationallicence Slørdahl S. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut Piene H. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut Solbakken J. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut Rossvoll O. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut Samstad S. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut Angelsen B. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/4(1990-07-01), 293-299 0140-0118 28:4<293 1990 28 11517 https://doi.org/10.1007/BF02446145 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02446145 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Slørdahl S. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut NATIONALLICENCE 700 1- Piene H. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut NATIONALLICENCE 700 1- Solbakken J. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut NATIONALLICENCE 700 1- Rossvoll O. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut NATIONALLICENCE 700 1- Samstad S. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut NATIONALLICENCE 700 1- Angelsen B. Department of Biomedical Engineering, University of Trondheim, 7006, Trondheim, Norway aut NATIONALLICENCE 773 0- Medical and Biological Engineering and Computing Kluwer Academic Publishers 28/4(1990-07-01), 293-299 0140-0118 28:4<293 1990 28 11517 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer