Zobrazeno 1 - 10
of 25
pro vyhledávání: '"K. R. Visser"'
Autor:
K. R. Visser
Publikováno v:
Medical & Biological Engineering & Computing. 30:636-640
The conductivity of stationary and flowing blood was measured at different hematocrit values (H). For stationary blood with erythrocytes in random orientation, the conductivity in S/m is estimated to be 1.57/(1+CH/(1-H)), with C=1.91. Variations in o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7478e375537367bb51372251d5cfbc9
https://doi.org/10.1007/bf02446796
https://doi.org/10.1007/bf02446796
Autor:
K. R. Visser, J.H.J. Muntinga
Publikováno v:
[1990] Proceedings of the Twelfth Annual International Conference of the IEEE Engineering in Medicine and Biology Society.
The electrical impedance of the left upper arm at changing cuff pressure was measured, together with the finger arterial blood pressure of the other arm at 13 healthy volunteers (66 f 5 yr). Apart from systolic, diastolic and mean arterial pressure,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82e67eb38494d99079a4677075231d7b
https://doi.org/10.1109/iembs.1990.691283
https://doi.org/10.1109/iembs.1990.691283
Publikováno v:
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991.
The systolic time intervals are preejection period (PEP) and left ventricular ejection time (LVET). Together they form the electromechanical systole (QS2). From the dZ/dt signal of the impedance cardiogram, the LVET can be measured. This is possible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b1a46a1306b3f569d7440f0029515c5
https://doi.org/10.1109/iembs.1991.684208
https://doi.org/10.1109/iembs.1991.684208
Publikováno v:
Journal of vascular research, 37(6), 485-493. KARGER
Due to the results of antihypertensive intervention studies, isolated systolic hypertension (ISH) has gained new interest lately. Yet, apart from increased aortic stiffness, the specific pathophysiological features of ISH have remained largely undete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe50e5b6277e0af6e6a81b25fc084a37
https://research.rug.nl/en/publications/fb8ef2a3-482f-4138-af36-d472f7026e2b
https://research.rug.nl/en/publications/fb8ef2a3-482f-4138-af36-d472f7026e2b
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 39(8)
Heterogeneity of left ventricular myocardial perfusion is an important clinical characteristic. Different aspects of this heterogeneity were analyzed.The coefficient of variation (v), characterizing heterogeneity, was modeled as a function of the num
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c5645cc28dfa9e64a868af74f82dcb4d
https://pubmed.ncbi.nlm.nih.gov/9708499
https://pubmed.ncbi.nlm.nih.gov/9708499
Publikováno v:
Journal of Hypertension, 15(4), 411-419. LIPPINCOTT WILLIAMS & WILKINS
Objective To investigate differences between in-vivo properties of a vascular bed in hypertensive patients and normotensive controls, Design Despite the controversy about the origin of essential hypertension and its accompanying vascular changes, it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d0cd9a7661f70035227288f1fc8db7d
https://pubmed.ncbi.nlm.nih.gov/9211176
https://pubmed.ncbi.nlm.nih.gov/9211176
Autor:
J, Brouwer, D J, van Veldhuisen, A J, Man in 't Veld, J, Haaksma, W A, Dijk, K R, Visser, F, Boomsma, P H, Dunselman
Publikováno v:
Journal of the American College of Cardiology. 28(5)
We sought to assess the prognostic value of heart rate variability measures, including Poincaré plots, in patients with mild to moderate chronic heart failure.Mortality is high in patients with heart failure, and many of them die suddenly. However,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::154129dd7c20a5563241c3bb2f07ab15
https://pubmed.ncbi.nlm.nih.gov/8890814
https://pubmed.ncbi.nlm.nih.gov/8890814
Autor:
Frans Boomsma, Dirk J. van Veldhuisen, W. Arnold Dijk, Jaap Haaksma, Jan Brouwer, K. R. Visser, Peter H.J.M. Dunselman, Arie J. Man in 't Veld, Kong I. Lie
Publikováno v:
Journal of the American College of Cardiology, 28(5), 1183-1189. ELSEVIER SCIENCE INC
Objectives. We sought to assess the prognostic value of heart rate variability measures, including Poincare plots, in patients with mild to moderate chronic heart failure. Background. Mortality is high in patients with heart failure, and many of them
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::998ccad3401503875f9c595e05264333
https://research.rug.nl/en/publications/11937e7a-0397-4e4f-9ce5-c5a1748facca
https://research.rug.nl/en/publications/11937e7a-0397-4e4f-9ce5-c5a1748facca
Publikováno v:
European journal of applied physiology and occupational physiology, 69(4), 281-286
We have evaluated the possibility of monitoring the plasma lactate concentration in human volunteers during cycle ergometer exercise using subcutaneous and transcutaneous microdialysis. In transcutaneous microdialysis, the relative increase in dialys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90d25fcb5f11dd76ef8ff4988030152a
https://research.rug.nl/en/publications/b20de1b0-718d-4558-9754-3f29efc077bc
https://research.rug.nl/en/publications/b20de1b0-718d-4558-9754-3f29efc077bc
Publikováno v:
Biological psychology. 36(1-2)
It is possible to accurately measure the left ventricular ejection time from the dZ/dt signal of impedance cardiography. The pre-ejection period can be measured from simultaneous recordings of ECG and dZ/dt. The thoracic admittance (reciprocal value
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22746ed405b857d3bcd1f6d8cd4b4f0f
https://pubmed.ncbi.nlm.nih.gov/8218623
https://pubmed.ncbi.nlm.nih.gov/8218623