Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Elastance"”.
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Analytical solution to a simplified circulatory model using piecewise linear elastance function
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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Sex Differences in Cardiovascular Adaptations to Chronic Endurance Exercise
… were combined to derive the ratio of arterial elastance (Ea) to ventricular elastance (Elv) as a global measure of ventricular-vascular coupling. Our findings suggest that although female marathoners had larger LVMI they did not have LV dysfunction or increased central hemodynamic load and had …
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Influence of Obstructive Sleep Apnea (OSA) on Rostral Fluid Shift, and the Pathophysiology on Asthma
… a model of the respiratory system, to estimate elastance of the airway tissues and total respiratory system in patients with asthma in response to increase in TFV. Our modelling results showed that increases in TFV was associated with an increase in airway tissue elastance (Chapter 6). Taken …
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The effects of magnesium treatment on short-term changes in heart rate variability, ventricular function and lipid profile in streptozotocin-induced diabetic rats
… diabetes-induced decrease in LV end-diastolic elastance (p < 0.05, n = 6/group) and the right shift of end diastolic equilibrium volume intercept from 49 ± 6 μ L to 25 ± 5 μL (p < 0.05, n = 6/group), without altering LV developed pressure or end systolic elastance. Diabetes significantly …
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Heart in Polycystic Kidney Disease is Characterized by Cardiac Dysfunction and Structural Deformation
… dysfunction. LV systolic contractility and elastance decreased in fibrotic PKD hearts resulted in systolic dysfunction.</p> <p><strong>Conclusions:</strong> Hearts from PKD patients are characterized with hypertrophy and fibrosis in the interstitial, perivascular and conduction system with …
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Atemmuster und Wahrnehmung bei unterschiedlichen Unterstützungsniveaus von volumenproportional und konventionell druckunterstützter Spontanatmung
… einstellbaren Druck. Bei Patienten mit erhöhter Elastance des respiratorischen Systems (Eadd) könnte VA durch die an das jeweilige Inspirationsvolumen angepasste Druckunterstützung diese kompensieren. Es war bisher jedoch nicht geklärt, ob Probanden genau das Unterstützungsniveau von VA …
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Millimeter-Wave and Sub-Terahertz Parametric Harmonic Generation
… the time-varying parameter (P), such as elastance (S), capacitance (C), conductance (G), or resistance (R), exhibits N−1 periods of a sine wave under one sinusoidal pumping cycle, which is named sinusoidal representation of pumped parameters. The maximum conversion efficiency of reactive …
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Studies in right ventricular function: Employing the conductance catheter method for ventricular volume determination
… diastole and proposed the model of "time-varying elastance". One success of this approach has been the development of contractile indices that are generally independent of loading conditions. These indices, Emax, preload recruitable stroke work index and dP/dtmax-end-diastolic volume have been …
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EFFECTS OF ARTIFICIALLY - INDUCED INTRINSIC POSITIVE END - EXPIRATORY PRESSURE IN MECHANICALLY VENTILATED PATIENTS WITH ACUTE RESPIRATORY FAILURE.
… at ZEEP. Regarding respiratory mechanics, static elastance did not change among the conditions, while interrupter and additional resistance were respectively lower and higher at PEEPinp than at the other conditions, in line with what expected from the increase in inflation time. Both DSphys and …
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On variational principles for dissipative networks and systems
… - R, accompanied by the series capacitors of elastance S = -R (in the impedance models), or the parallel inductors of inverse inductance Γ = -G (in the admittance models). The network state model presents an obstacle to Hamiltonian formulation because of generally unequal number of …
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Assessment of Cardiac Function by Acoustic Radiation Force (ARF) Based Methods of Ultrasound Elastography
… to be a direct measure of the time-varying elastance measured during the cardiac cycle using pressure-volume measurements. The question arose as to whether these ARF based measurements of dynamic stiffness could be used for cardiac functional assessments during systole and diastole; and if …
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Vergleich regionaler und globaler Kontraktilitätsparameter unter den Bedingungen der Inotropieänderung im normoperfundierten und ischämischen Myokard
Untersucht wurde das Verhalten der globalen linksventrikulären (LV) Elastanz sowie der regionalen systolischen Strain Rate, einem neuen echokardiographisch ermittelten Parameter. Gegenstand der Untersuchung war pharmakologisch induzierte Inotropiemodulation auf diese Parameter unter koronarer …