Searched for: subject%3A%22Vascular%255C%2BResistance%22
(1 - 10 of 10)
document
Jellema, W.T. (author), Groeneveld, A.B.J. (author), Wesseling, K.H. (author), Thijs, L.G. (author), Westerhof, N. (author), van Lieshout, J.J. (author)
OBJECTIVE: To establish the heterogeneity of hemodynamic responses to dobutamine in patients with septic shock and to identify the predictive factors of these hemodynamic responses. DESIGN: Prospective study. SETTING AND PATIENTS: A total of 12 patients with septic shock in a tertiary medical intensive care unit. INTERVENTIONS: A 20-min...
article 2006
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Gisolf, J. (author), Westerhof, B.E. (author), van Dijk, N. (author), Wesseling, K.H. (author), Wieling, W. (author), Karemaker, J.M. (author), TNO Industrie (author)
Objectives We set out to determine the effect of sublingual nitroglycerin (NTG), as used during routine tilt testing in patients with unexplained syncope, on hemodynamic characteristics and baroreflex control of heart rate (HR) and systemic vascular resistance (SVR). Background Nitroglycerin is used in tilt testing to elicit a vasovagal response...
article 2004
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TNO Biomedical Instrumentation (author), Kingma, R. (author), Voorde, B.J.ten (author), Scheffer, G.J. (author), Karemaker, J.M. (author), Mackaay, A.J.C. (author), Wesseling, K.H. (author), Lange, J.J.de (author)
Endoscopic thoracic sympathectomy at T2-T4 is an effective and safe treatment for primary axillary and palmar hyperhidrosis and facial blushing refractory to conventional treatment. T2 and T4 ganglia however are in the direct pathway of sympathetic innervation of the heart and part of the vasomotor nerves. In this study we investigate possible...
article 2002
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Jansen, J.R.C. (author), Schreuder, J.J. (author), Mulier, J.P. (author), Smith, N.T. (author), Settels, J.J. (author), Wesseling, K.H. (author), Technisch Physische Dienst TNO - TH (author)
In three clinical centres, we compared a new method for measuring cardiac output with conventional thermodilution. The new method computes beat-to-beat cardiac output from radial artery pressure by simulating a three-element model of aortic input impedance, and includes non-linear aortic mechanical properties and a self-adapting systemic...
article 2001
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TNO Biomedical Instrumentation (author), Jellema, W.T. (author), Groeneveld, A.B.Johan (author), van Goudoever, J. (author), Wesseling, K.H. (author), Westerhof, N. (author), Lubbers, M.J. (author), Kesecioglu, J. (author), van Lieshout, J.J. (author)
OBJECTIVE: The purposes of this study were to investigate the hemodynamic changes induced by intermittent manual lung hyperinflation (MHI) and to assess if these changes are adverse enough to warrant prohibition of MHI as a routine procedure in the care of patients with septic shock. DESIGN: The study's design was experimental prospective....
article 2000
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Bos, W.J.W. (author), Zietse, R. (author), Wesseling, K.H. (author), Westerhof, N. (author), TNO Biomedical Instrumentation (author)
Background. Arteriovenous (AV) fistulas used for hemodialysis access may affect cardiac load by increasing the preload while decreasing the afterload. In dogs, AV fistulas have also been shown to affect coronary perfusion negatively. We investigated the net effect of AV fistulas on cardiac oxygen supply and demand. Methods. Aortic pressure waves...
article 1999
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de Jong-de Vos Van Steenwijk, C.C.E. (author), Wieling, W. (author), Harms, M.P.M. (author), Wesseling, K.H. (author), TNO Biomedical Instrumentation (author)
1. Fainting is a common phenomenon in young subjects, but the final events before the actual faint are not well known. The aim of the present study was to study the inter-individual variability of haemodynamic events associated with near-fainting in children and teenagers. 2. Sixty-eight healthy subjects (aged 6-16 years) performed a 70┬░tilt-up...
article 1997
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Havenith, G. (author), Inoue, Y. (author), Luttikholt, V. (author), Kenny, W.L. (author)
Cross-section comparisons of the effect of age on physiological responses to heat stress have yielded conflicting results, in part because of the inability to separate chronological age from factors which change in concert with the biological aging process. The present study was designed to examine the relative influence of age on cardiovascular...
article 1995
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TNO Biomedical Instrumentation (author), Wesseling, K.H. (author), Jansen, J.R.C. (author), Settels, J.J. (author), Schreuder, J.J. (author)
We computed aortic flow pulsations from arterial pressure by simulating a nonlinear, time-varying three-element model of aortic input impedance. The model elements represent aortic characteristic impedance, arterial compliance, and systemic vascular resistance. Parameter values for the first two elements were computed from a published, age...
article 1993
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van Lieshout, J.J. (author), Wieling, W. (author), Settels, J.J. (author), Karemaker, J.M. (author), TNO Biomedical Instrumentation (author)
In a patient with tetanus we tested the hypothesis that the hyperadrenergic cardiovascular instability might be due to impairment of the baroreceptor reflex by the tetanus toxin. Baroreflex sensitivity assessed with the phenylephrine method was found to be normal. Changes in arterial pressure correlated inversely with relative changes in plasma...
article 1991
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