Concept

Souffle cardiaque

Publications associées (37)

On parallel computation of blood flow in human arterial network based on 1-D modelling

Parallel computation of blood flow in a 1D model of human arterial network has been carried out employing a Taylor Galerkin finite element method. Message passing interface libraries have been used on Origin 2000 SGI machine. A Greedy strategy for load-dis ...

Springer-Verlag2003

Estimation of local aortic elastic properties with MRI

Nikolaos Stergiopoulos, Reto Meuli

Aortic compliance and pulse wave velocity (PWV) are important determiners of heart load, and are clinically useful indices of cardiovascular risk. Most direct methods to derive them require invasive pressure measurement. In this work a noninvasive techniqu ...

2002

Mechanism of pulmonary venous pressure and flow waves

Nikolaos Stergiopoulos, Patrick Segers

The pulmonary venous systolic flow wave has been attributed both to left heart phenomena, such as left atrial relaxation and descent of the mitral annulus, and to propagation of the pulmonary artery pressure pulse through the pulmonary bed from the right v ...

2000

Role of total arterial compliance and peripheral resistance in the determination of systolic and diastolic aortic pressure

Nikolaos Stergiopoulos, Nico Westerhof

The goal of the study was to define the major arterial parameters that determine aortic systolic (Ps) and diastolic (Pd) pressure in the dog. Measured aortic flows were used as input to the two-element windkessel model of the arterial system, with peripher ...

1999

Determinants of pulse pressure

Nikolaos Stergiopoulos, Nico Westerhof

We have searched to define the major arterial parameters that determine aortic systolic (Ps) and diastolic (Pd) pressure in the dog. Measured aortic flows were used as input to the 2-element windkessel model of the arterial system, with peripheral resistan ...

1998

Selective distribution of lactate dehydrogenase isoenzymes in neurons and astrocytes of human brain

Pierre Magistretti, Luc Pellerin

In vertebrates, the interconversion of lactate and pyruvate is catalyzed by the enzyme lactate dehydrogenase. Two distinct subunits combine to form the five tetrameric isoenzymes of lactate dehydrogenase. The LDH-5 subunit (muscle type) has higher maximal ...

1996

Scatter in input impedance spectrum may result from the elastic nonlinearity of the arterial wall

Nikolaos Stergiopoulos, Jean-Jacques Meister, Nico Westerhof

We have examined the role of the nonlinear elastic properties of the arterial wall on the human aortic input impedance obtained at different heart rates and different pressure and flow wave shapes. Pressure and flow were taken from a computer model that pr ...

American Physiological Society1995

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