Searched for: subject%3A%22Models%252C%255C%2BCardiovascular%22
(1 - 9 of 9)
document
Rubbens, M.P. (author), Mol, A. (author), Boerboom, R.A. (author), Bank, R.A. (author), Baaijens, F.P.T. (author), Bouten, C.V.C. (author), TNO Industrie en Techniek TNO Kwaliteit van Leven (author)
Tissue-engineered heart valves lack sufficient amounts of functionally organized structures and consequently do not meet in vivo mechanical demands. To optimize tissue architecture and hence improve mechanical properties, various in vitro mechanical conditioning protocols have been proposed, of which intermittent straining is most promising in...
article 2009
document
Guzik, P. (author), Piskorski, J. (author), Krauze, T. (author), Schneider, R. (author), Wesseling, K.H. (author), Wykrȩtowicz, A. (author), Wysocki, H. (author), TNO Biomedical Instrumentation (author)
Aim: To analyze the correlation of the Poincaré plot descriptors of RR intervals with standard measures of heart rate variability (HRV) and spontaneous baroreflex sensitivity (BRS). A physiological model of changing respiratory rates from 6 to 15 breaths/min provided a wide range of RR intervals for analysis. Material and methods: Beat-to-beat...
article 2007
document
van Lieshout, J.J. (author), Toska, K. (author), van Lieshout, E.J. (author), Eriksen, M. (author), Walløe, L. (author), Wesseling, K.H. (author), TNO Biomedical Instrumentation (author)
The proper understanding of the cardiovascular mechanisms involved in complaints of short-lasting dizziness and the evaluation of unexplained recurrent syncope requires continuous monitoring of cardiac stroke volume (SV) in addition to blood pressure and heart rate. The primary aim of the present study was to evaluate a pulse wave analysis...
article 2003
document
Segers, P. (author), Stergiopulos, N. (author), Schreuder, J.J. (author), Westerhof, B.E. (author), Westerhof, N. (author)
It is generally accepted that the left ventricle (LV) hypertrophies (LVH) to normalize systolic wall stress (σ(s)) in chronic pressure overload. However, LV filling pressure (P(v)) may be elevated as well, supporting the alternative hypothesis of end-diastolic wall stress (σ(d)) normalization in LVH. We used an LV time-varying elastance model...
article 2000
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Harms, M.P.M. (author), Wesseling, K.H. (author), Pott, F. (author), Jenstrup, M. (author), van Goudoever, J. (author), Secher, N.H. (author), van Lieshout, J.J. (author), TNO Biomedical Instrumentation (author)
The relationship between aortic flow and pressure is described by a three-element model of the arterial input impedance, including continuous correction for variations in the diameter and the compliance of the aorta (Modelflow). We computed the aortic flow from arterial pressure by this model, and evaluated whether, under orthostatic stress,...
article 1999
document
Stergiopulos, N. (author), Westerhof, B.E. (author), Westerhof, N. (author), TNO Biomedical Instrumentation (author)
We propose a new method to derive aortic pressure from peripheral pressure and velocity by using a time domain approach. Peripheral pressure is separated into its forward and backward components, and these components are then shifted with a delay time, which is the ratio of wave speed and distance, and added again to reconstruct aortic pressure....
article 1998
document
Dooijewaard, G. (author), van Boheemen, P.A. (author), Binnema, D.J. (author), Kluft, C. (author), Gaubius Laboratory, VVO-TNO, PO Box 430, 2300 AK Leiden, Instituut voor verouderings- en vaatziekten onderzoek TNO (author)
Chemicals/CAS: Tissue Plasminogen Activator, EC 3.4.21.68; Urinary Plasminogen Activator, EC 3.4.21.73
article 1992
document
Gaubius Instituut TNO (author), van Hinsbergh, V.W.M. (author)
Chemicals/CAS: Cytokines; Plasminogen Activator Inhibitor 1; plasminogen activator, urokinase receptors; Plasminogen, 9001-91-6; Receptors, Cell Surface; Urinary Plasminogen Activator, EC 3.4.21.73.
article 1992
document
Gizdulich, P. (author), Wesseling, K.H. (author), TNO Biomedical Instrumentation (author)
Pressure-volume (p-V) relationships of a segment of the forearm circulation have been measured in nine male healthy subjects. Forearm volume was measured using electrical impedance plethysmography, arterial transmural pressure by subtracting mean arterial pressure measured contralaterally in a finger from the pressure in a cuff placed over the...
article 1988
Searched for: subject%3A%22Models%252C%255C%2BCardiovascular%22
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