Cardiovascular dynamics during head-up tilt assessed via pulsatile and non-pulsatile models
نویسندگان
چکیده
منابع مشابه
A Mathematical Cardiovascular Model with Pulsatile and Non-pulsatile Components
In this study, two existing mathematical cardiovascular models, a non-pulsatile global model and a simplified pulsatile left heart model were investigated, modified and combined. A global lumped compartment cardiovascular model was developed that could predict the pressures in the systemic and pulmonary circulation, and specifically the pulsatile pressures in the the finger arteries where real-...
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In healthy individuals, plasma insulin levels oscillate in both fasting and fed states. Numerous studies of isolated pancreata and pancreatic islets support the hypothesis that insulin oscillations arise because the underlying rate of insulin secretion also oscillates; yet, insulin secretion has never been observed to oscillate in individual pancreatic beta-cells. Using expressed fluorescent ve...
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The effects of pulsatile and non-pulsatile cardiopulmonary bypass (CPB) on levels of peripheral vascular resistance and plasma angiotensin II (AII) have been studied in 24 patients submitted to elective cardiac surgical procedures. Twelve patients had conventional non-pulsatile perfusion throughout the period of CPB (non-pulsatile group), while 12 had pulsatile perfusion during the central peri...
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In Nature, there exist a variety of cardiovascular circulation networks in which the energetic ventricular load has both steady and pulsatile components. Steady load is related to the mean cardiac output (CO) and the haemodynamic resistance of the peripheral vascular system. On the other hand, the pulsatile load is determined by the simultaneous pressure and flow waveforms at the ventricular ou...
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In this study, a lumped compartment cardiovascular model is developed to predict pulsatile pressures in the systemic and pulmonary circulation as well as in finger arteries. Essential compartments of the model include arterial and venous pulmonary, left and right ventricles, and arterial and venous systemic compartments. A pulsatile left ventricle is incorporated to be the source of pulse waves...
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ژورنال
عنوان ژورنال: Journal of Mathematical Biology
سال: 2019
ISSN: 0303-6812,1432-1416
DOI: 10.1007/s00285-019-01386-9