l-Arginine Impacts Pulmonary Vascular Structure in Rats with an Aortocaval Shunt

2002 ◽  
Vol 108 (1) ◽  
pp. 20-31 ◽  
Author(s):  
Wei Bing ◽  
Du Junbao ◽  
Qi Jianguang ◽  
Li Jian ◽  
Tang Chaoshu
Keyword(s):  
Vascular Structure ◽  
Aortocaval Shunt

Lasertechniques treatment of vascular malformations

Phlebologie ◽  
2010 ◽  
Vol 39 (03) ◽  
pp. 167-175
Author(s):  
M. Poetke ◽  
P. Urban ◽  
H.-P. Berlien
Keyword(s):  
Endothelial Cells ◽  
Spontaneous Regression ◽  
Vascular System ◽  
Vascular Malformations ◽  
Clinical Importance ◽  
Vascular Structure ◽  
Laser Application ◽  
Vascular Morphogenesis ◽  
Structural Abnormalities

SummaryVascular malformations are structural abnormalities, errors of vascular morphogenesis, which can be localized in all parts of the vascular system. All vascular malformations by definition, are present at birth and grow proportionately with the child; their volume can change. In contrast to the haemangiomas, which only proliferate from the endothelial cells the division in stages is of clinical importance. Vascular malformations are divided from the part of vascular system, which is affected.In principle the techniques of laser application in congenital vascular tumours like haemangiomas and in vascular malformations are similar, but the aim is different. In tumours the aim is to induce regression, in vascular malformations the aim is to destroy the pathologic vascular structure because there is no spontaneous regression. This means that the parameters for treatment of vascular malformations must be more aggressive than for vascular tumours.

scholarly journals Retinal vascular fractal dimensions and their association with macrovascular cardiac disease.

2021 ◽  
Author(s):  
Sebastian Dinesen ◽  
Pia Søndergaard Jensen ◽  
Maria Bloksgaard ◽  
Søren Leer Blindbæk ◽  
Jo G.R. De Mey ◽  
...  
Keyword(s):  
Confidence Interval ◽  
Cardiac Disease ◽  
Artery Bypass ◽  
Fractal Dimensions ◽  
Macrovascular Disease ◽  
Control Group ◽  
Vascular Structure ◽  
Non Invasive ◽  
Automatic Software ◽  
Multivariable Regression

Introduction As the only part of the human vasculature, retina is available for direct, non-invasive inspection. Retinal vascular fractal dimension (DF) is a method to measure the structure of the retinal vascular tree, with higher non-integer values between 1 and 2 representing a more complex and dense retinal vasculature. Retinal vascular structure has been associated with a variety of systemic diseases and this study examined the association of DF and macrovascular cardiac disease in a case-control design. Methods Retinal fundus photos were captured with Topcon TRC-50X in 38 persons that had coronary artery bypass grafting (CABG, cases) and 37 cardiovascular healthy controls. The semi-automatic software VAMPIRE was used to measure retinal DF. Results Patients with CABG had lower DF of the retinal main venular vessels compared to the control group (1.15 vs. 1.18, p=0.01). In a multivariable regression model adjusted for gender and age, eyes in the fourth quartile with higher DF were less likely to have CABG compared to patients in the first (OR, 7.20; 95% confidence interval, 1.63 to 31.86; p=0.009) and second quartile (OR, 8.25; 95% confidence interval, 1.70 to 40.01; p=0.009). Conclusions This study demonstrates that lower complexity of main venular vessels associates with higher risk of having CABG. The research supports the hypothesis that the retinal vascular structure can be used to assess non-ocular macrovascular disease.

The Vascular Structure of the Kidney of Mallards and Doves

1999 ◽  
Vol 5 (S2) ◽  
pp. 1192-1193
Author(s):  
H. Ditrich
Keyword(s):  
Vascular System ◽  
Venous Drainage ◽  
Portal System ◽  
Physiological Data ◽  
Vascular Structure ◽  
Serial Sections ◽  
Functional Importance ◽  
Additional Material ◽  
Functional Studies ◽  
Primitive Feature

The architecture of the kidney of birds (and also reptiles) is, unlike in mammalians, mainly determined by the organization of the blood vascular system. Besides arterial supply and venous drainage, the renal portal system forms a main structural component. While the latter was often regarded as a “primitive” feature in the literature, morphological and physiological data reveal its great functional importance.Microvascular corrosion casts studied in the scanning electron microscope permit the visualization of minute vessels, retaining their 3D-arrangement. Additionally, when compared with graphical reconstructions of serial sections, this method avoids several inherent artifacts like fixation and dehydration shrinkage as well as the compression of the object by the sectioning blade. Most of the studies on avian kidneys with this technique used the domestic chicken as a model. In order to provide additional material for comparative and functional studies, data on the intrarenal vascular structure of other species are required.

High‐security photoacoustic identity recognition by capturing hierarchical vascular structure of finger

2021 ◽  
Author(s):  
Mingman Sun ◽  
Yuanzheng Ma ◽  
Zhuangzhuang Tong ◽  
Zhiyang Wang ◽  
Wuyu Zhang ◽  
...  
Keyword(s):  
Vascular Structure ◽  
Identity Recognition ◽  
High Security

14.2 LONGITUDINAL CHANGE IN VASCULAR STRUCTURE AND FUNCTION OVER A 5 YEAR PERIOD IN TWINS UK COHORT

2016 ◽  
Vol 16 (C) ◽  
pp. 83
Author(s):  
Marina Cecelja ◽  
Benyu Jiang ◽  
Tim Spector ◽  
Phil Chowienczyk
Keyword(s):  
Structure And Function ◽  
Longitudinal Change ◽  
Vascular Structure ◽  
And Function

scholarly journals Comorbidity and Ventricular and Vascular Structure and Function in Heart Failure With Preserved Ejection Fraction

2012 ◽  
Vol 5 (6) ◽  
pp. 710-719 ◽  
Author(s):  
Selma F. Mohammed ◽  
Barry A. Borlaug ◽  
Véronique L. Roger ◽  
Sultan A. Mirzoyev ◽  
Richard J. Rodeheffer ◽  
...  
Keyword(s):  
Heart Failure ◽  
Ejection Fraction ◽  
Structure And Function ◽  
Vascular Structure ◽  
Preserved Ejection Fraction ◽  
And Function
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