منابع مشابه
Diminished wave reflection in the aorta. A novel physiological action of insulin on large blood vessels.
Epidemiological data suggest that insulin may have direct effects on large-vessel function, but thus far insulin has only been shown, after prolonged infusions, to slowly decrease peripheral vascular resistance by increasing muscle blood flow. We determined whether physiological doses of insulin affect function of large arteries, before any changes in peripheral blood flow, in vivo using pulse ...
متن کاملQuantification of wave reflection in the human aorta from pressure alone: a proof of principle.
Wave reflections affect the proximal aortic pressure and flow waves and play a role in systolic hypertension. A measure of wave reflection, receiving much attention, is the augmentation index (AI), the ratio of the secondary rise in pressure and pulse pressure. AI can be limiting, because it depends not only on the magnitude of wave reflection but also on wave shapes and timing of incident and ...
متن کاملWave reflection in systolic hypertension: smaller stature, shorter aorta: higher pulse pressure?
Wave Reflection in Systolic Hypertension: Smaller Stature, Shorter Aorta: Higher Pulse Pressure? To the Editor: In a recent issue of Hypertension, Mitchell et al1 suggested that, among patients with systolic hypertension, reduced aortic diameter and increased wall stiffness, rather than premature wave reflection, are primarily responsible for increasing pulse pressure (PP). We share the concern...
متن کاملWave Reflection and Characteristic Impedance in the
2001The combined measurement of aortic root pressure, flow and diameter permits determination of e.g. arterial compliance (C) and characteristic impedance (Zo). These systemic circulatory properties reflect the dynamic load to the left ventricle. Obviously, it is of clinical interest to study possible effects of cardiopharmacologic intervention on C and Zo. Therefore, the specific aims of this ...
متن کاملStudy on Free Vibration and Wave Power Reflection in Functionally Graded Rectangular Plates using Wave Propagation Approach
In this paper, the wave propagation approach is presented to analyze the vibration and wave power reflection in FG rectangular plates based on the first order shear deformation plate theory. The wave propagation is one of the useful methods for analyzing the vibration of structures. This method gives the reflection and propagation matrices that are valuable for the analysis of mechanical energy...
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ژورنال
عنوان ژورنال: Hypertension
سال: 1999
ISSN: 0194-911X,1524-4563
DOI: 10.1161/01.hyp.33.5.1118