Journal ArticleDOI
Noninvasive vascular ultrasound: an asset in vascular medicine.
Reads0
Chats0
TLDR
An ultrasound system to assess diameter, blood flow velocity and volume flow in the brachial artery in man and the results showed that the diameter as assessed with the system compared favorably with the diameter of the tubing in an in vitro set-up.Abstract:
### 1.1 Introduction
There are always moments in life, inviting to look back on the past. Entering the next millennium is certainly such an occasion, because it happens generally only once in a life-time. Therefore, we very much liked the idea of the Editors to publish a special issue of Cardiovascular Research on the occasion of this event and to explore the impact of the articles in the journal most frequently cited over the years on further developments in the field. We gladly accepted their invitation to evaluate in this respect the article by Levenson et al. published in Cardiovascular Research in 1981 [1].
### 1.2 Content of the article
In this article the authors described an ultrasound system to assess diameter, blood flow velocity and volume flow in the brachial artery in man. The apparatus consisted of an adjustable range-gated pulsed Doppler system, emitter frequency 8 MHz, combined with a double transducer system to accurately determine the angle between ultrasound beam and vessel axis. The latter is a prerequisite for accurate determination of both the velocity in and the diameter of the artery and, hence, for proper calculation of volume flow. The length of the sample volume could be adjusted by varying the length of the reception duration. A small sample volume was used to measure velocity locally in the artery and to determine the diameter of the vessel accurately and a large one to estimate the average velocity over the cross-sectional area of the vessel. A static high-pass filter with a lower cut-off frequency of 250 Hz was used to reduce interference of high amplitude low frequency signals reflected by the arterial walls. The validity of the system was tested in an in vitro set-up and the results showed that the diameter as assessed with the system compared favorably with the diameter of the tubing in …read more
Citations
More filters
Journal ArticleDOI
Social and psychosocial influences on inflammatory markers and vascular function in civil servants (the Whitehall II study).
Harry Hemingway,Martin J. Shipley,Michael J. Mullen,Meena Kumari,Eric J. Brunner,Mia Taylor,Ann E. Donald,John E. Deanfield,Michael Marmot +8 more
TL;DR: It is found that social position was inversely associated with interleukin-6 and C-reactive protein and that participants with mild depression had impaired endothelial function.
Journal ArticleDOI
Non-invasive ultrasound in arterial wall dynamics in humans: what have we learned and what remains to be solved
TL;DR: The most important achievements in non-invasive assessment of dynamic artery wall properties in humans with emphasis on the clinical relevance of the observations are discussed, with special attention to changes observed in aging, and in essential and borderline hypertension.
Journal ArticleDOI
Biomechanics of plaque rupture: progress, problems, and new frontiers.
TL;DR: A critical review draws attention to the relative paucity of data on the mechanical behavior of small test portions of arterial tissues and on the relation of plaque locations to local vessel curvature and curvature flexure in epicardial arteries.
Journal ArticleDOI
Assessment of the spatial homogeneity of artery dimension parameters with high frame rate 2-D B-mode.
TL;DR: To elicit vessel wall inhomogeneities in diameter and distension along an arterial segment, a 2-D vessel wall-tracking system based on fast B-mode has been developed and can be implemented in echo systems supporting high frame rates and real-time processing of radiofrequency data.
Journal ArticleDOI
Gender differences in wall shear-mediated brachial artery vasoconstriction and vasodilation.
TL;DR: Shear-mediated arterial vasodilation and vasoconstriction were more pronounced in women than in men, suggesting different gender-related sensitivity in the regulation of large-artery vascular tone.
References
More filters
Journal ArticleDOI
Diurnal blood pressure and blood pressure variability in diabetic normotensive and hypertensive subjects.
TL;DR: Ambulatory blood pressure monitoring reveals certain characteristic blood pressure variability in the diabetic patient with hypertension and allows an assessment of the effects of antihypertensive drug therapy in order to ensure blood pressure control.
Journal ArticleDOI
Faster ageing of the carotid artery bifurcation in borderline hypertensive subjects.
TL;DR: The findings in this study indicate faster ageing of the carotid artery bifurcation in male BHT than in normotensives of comparable age, and in particular, the proximal part of the vehicle bulb, where the baroreceptors are predominantly located, is most affected by the disease.
Journal ArticleDOI
Biaxial elastic properties of rat arteries in vivo: influence of vascular wall cells on anisotropy.
Gilbert L'Italien,N. R. Chandrasekar,Glenn M. LaMuraglia,William C. Pevec,Sandip Dhara,David F. Warnock,William M. Abbott +6 more
TL;DR: There is no consensus as to the degree of arterial anisotropy or its relationship to vascular cell function as discussed by the authors, but given the relevance of the isotropic assumption in formulating elasticity models, rel...
Journal ArticleDOI
Different Effects of Ageing on Elastic and Muscular Arterial Bifurcations in Men
TL;DR: The homogeneous distribution of wall elasticity in the elastic CAB at a younger age becomes inhomogeneous at an older age, while the opposite is observed in the muscular FAB.
Journal ArticleDOI
The predictive role of systolic, diastolic and mean blood pressures on cardiovascular and all causes of death
TL;DR: Both univariate analysis and multivariate analysis clearly showed the superiority of SBP over DBP in predicting fatal events; MBP played an intermediate role.