scholarly journals Relationship of vascular pathology, demographic and radio-anatomical features in aortic dissections detected by multidetector CT

2021 ◽  
Vol 18 (6) ◽  
pp. 40-44
Author(s):  
Serkan Oner ◽  
Yusuf Secgın ◽  
Zulal Oner
Keyword(s):  
Multidetector Ct ◽  
Vascular Pathology ◽  
Anatomical Features ◽  
Aortic Dissections ◽  
Relationship Of

Phylloepiphytic interaction between bacteria and different plant species in a tropical agricultural system

2008 ◽  
Vol 54 (11) ◽  
pp. 918-931 ◽  
Author(s):  
Lílian Estrela Borges Baldotto ◽  
Fábio Lopes Olivares
Keyword(s):  
Cell Wall ◽  
Plant Species ◽  
Epidermal Cell ◽  
Fungal Spore ◽  
Epicuticular Wax ◽  
Agricultural System ◽  
Anatomical Features ◽  
Epidermal Cell Wall ◽  
Bacteria And Fungi ◽  
Relationship Of

Plant surfaces are a favourable niche for bacterial establishment, and hypothetically, plant species differ in their capacity to harbour epiphytic bacterial communities. This study was conducted to evaluate and describe the structural relationship of a bacterial community at the phyllosphere level with different plant species in a tropical ecosystem. Leaf blades of 47 plant species distributed in 27 botanical families were collected on a typical small Brazilian farm and prepared for observation under light and scanning electron microscopy. Naturally occurring bacteria were the most abundant settlers of the phylloplane, followed by fungal spore or hyphae. All plant species studied were colonized by phylloepiphytic bacteria, which were observed as solitary cells, microcolonies, and biofilms. However, independent of the family, the plant species differed in the pattern of phyllosphere colonization, as reflected in bacteria frequency and presence or absence of anatomical features that would favour the association. The phylloepiphytic bacteria were preferentially established on the following sites: epidermal cell wall junctions, glandular and nonglandular trichomes, veins, stomata, and epidermal cell wall surface. Profuse bacteria and fungi colonization was observed, at a level that was at least comparable with temperate regions. Interestingly, fungi seemed to alter the bacteria colonization pattern, most probably by microenvironmental modifications. The trichome type and density as well as the presence of epicuticular wax on the leaf blade surface seemed to be the most determinant anatomical features for the pattern of phyllosphere colonization. The presence of trichomes has a favourable, and epicuticular wax an unfavourable influence on the plant–bacteria interaction.

scholarly journals The relationship of the anatomical features of the structure of the main veins with clinical manifestations of venous pathology and osteoarticular system of the lower limbs

2017 ◽  
Vol 9 (4) ◽  
pp. 270
Author(s):  
Galina Viktorovna Yarovenko ◽  
S. E. Katorkin ◽  
P. N. Myshentsev
Keyword(s):  
Clinical Manifestations ◽  
Lower Limbs ◽  
Anatomical Features ◽  
Relationship Of ◽  
The Relationship

Цель. Оптимизация лечебно-диагностической тактики у пациентов с хроническими заболеваниями вен (ХЗВ) путем оценки анатомических особенностей магистральных вен и изменений опорно-двигательной системы (ОДС) нижних конечностей. Метериалы и методы. Проведено комплексное обследование 293 пациентов с ХЗВ и сопутствующей патологией ОДС. Выполнялась ультразвуковая допплерография и ангиосканирование на аппаратах «Aloka 4», «Logic 7» и «SonoScape». Клинический анализ движений проводился на аппаратно-программном комплексе «МБН-Биомеханика» и включал подометрию, гониометрию и функциональную электромиографию. Деформации стоп оценивались цифровой фотоплантографией.Результаты. Типичное анатомическое строение венозной системы выявлено у 156 (53,2%) пациентов. У 147 (50,1%) обнаружена относительная клапанная несостоятельность общей бедренной (ОБВ), подколенной (ПкВ) или берцовых вен. У 23 (7,8%) пациентов выявлено удвоение поверхностной бедренной вены (ПБВ) с совокупным диаметром ПБВ 16,3±2,5 мм. Дилатация глубоких вен зафиксирована у 31 (10,6%) пациента. Транспозиция ПБВ отмечена у 13 (4,4%) пациентов. В подкожной венозной системе наиболее часто выявлялось У-образное разделение большой подкожной вены (БПВ) у устья - 30 (10,2%) пациентов или ее удвоение - 24 (8,2%). Вена Леонардо выявлена у 10 (3,4%), а вена Джиакомини у 23 (7,8%) пациентов. У пациентов с С3 и С4 классами хронической венозной недостаточности (ХВН) нетравматические деформации стоп выявлены у 59 (68,6%) и 51 (79,6%), артроз суставов стоп – у 25 (29,1%) и 21 (32,8%). При С5-С6 классах деформации стоп II-III степени с нарушением рессорной, балансировочной и толчковой функции диагностированы в 65 (94,2%) наблюдениях. Это значительно снижает эффективность мышечно-венозной помпы. Формируется артрогенный конгестивный синдром. Заключение. Анатомические особенности вен нижних конечностей и сопутствующая патология опорно-двигательной системы способствуют усугублению клинических проявлений ХВН. При выборе методов диагностики и тактики лечения необходим комплексный междисциплинарный подход.Ключевые слова: хроническая венозная недостаточность, анатомия вен, диагностика, оперативное лечение

Abstract 3207: Ratio of Microparticles To Endothelial Progenitor Cells Is Increased In A Diabetic Population

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Anne M Curtis ◽  
Lifeng Zhang ◽  
Elizabeth Medenilla ◽  
Ming Gui ◽  
Patrick F Wilkinson ◽  
...  
Keyword(s):  
Progenitor Cells ◽  
Endothelial Progenitor Cells ◽  
Vascular Function ◽  
Cellular Damage ◽  
Vascular Pathology ◽  
Diabetic Patients ◽  
Endothelial Progenitor ◽  
Age Related ◽  
Increased Risk ◽  
Relationship Of

Diabetes Mellitus (DM) is strongly associated with a high incidence of cardiovascular disease (CVD) although often individuals show no symptoms or signs of disease. Therefore, quantitative measures are needed to distinguish those diabetic patients at higher risk for CV events. Cell derived microparticles (MPs), submicron membrane vesicles released from activated cells, and endothelial progenitor cells (EPCs) are mediators of cellular damage and endothelial reparative capacity respectively. Both are emerging biomarkers of vascular health and have been assessed individually in diabetic populations. To extend on this, we examined whether the relationship of MPs to EPCs could be used as a potential index of vascular pathology. Plasma samples were collected from patients with early-stage (ES, Diagnosis<1yr, n=11, 51±4yrs, 7.2±0.5% HbA1c) and long-term (LT, Diagnosis>5yrs, n=21, 64±3yrs, 7.1±0.3% HbA1c) with type 2 DM and compared to age related healthy volunteers (H, n=18, 57±3yrs, 5.3±0.7% HbA1c). EPCs positive for CD133 + /CD34 + and MP subtypes, AnnexinV + (AnnV + ), platelets (CD41 + ), monocytes (CD14 + ) and endothelial (CD144 + ) were measured by flow cytometry. Pro-coagulant microparticles and quantification of soluble proteins was measured using ELISA based methods. A significant relationship was found between MPs and EPCs which correlated with disease duration (H vs. ES vs. LT). Significant changes of pro-coagulant MPs ( P =0.02) and AnnV + MPs ( P =0.02) were noted. Of particular interest, the ratio of CD144 + MPs/EPC increased dramatically ( P =0.009) followed by ratios of AnnV + ( P =0.01), CD41 + ( P =0.01) and CD14 + ( P =0.03) MPs/EPCs. These indices of compromised vascular function were highest in the LT group despite intensive statin therapy (LDL mg/dL, 109±8 in H, vs. 80±7 in LT, P =0.01). Of note, the ratio of endothelial MPs/endothelial progenitor cells (CD144 + MPs/EPCs) was more informative than CRP and a range of inflammatory mediators. This is the first report of a relationship of MPs and EPCs in DM. This ratio provides a quantitative measurement of both pro-coagulant and endothelial injury and can identify DM patients with potentially increased risk of CV disease.

Living morphogenesis of the ventricles and congenital pathology of their component parts

2001 ◽  
Vol 11 (6) ◽  
pp. 588-600 ◽  
Author(s):  
María V. de la Cruz ◽  
Roger R. Markwald ◽  
Edward L. Krug ◽  
Lila Rumenoff ◽  
Concepción Sánchez Gómez ◽  
...  
Keyword(s):  
Heart Tube ◽  
Atrioventricular Canal ◽  
Atrioventricular Valves ◽  
Atrioventricular Junction ◽  
Anatomical Features ◽  
The Right ◽  
Relationship Of ◽  
The Relationship

Living morphogenetic studies show that each definitive ventricle is constructed from different primitive cardiac segments, and each has its specific anatomical features. These ventricular segments are the atrioventricular junction; the primitive inlet segment, part of the primary heart tube, which initially provides the inlets of each ventricle; the primitive outlet segment, which gives rise to both ventricular outlets; and the apical trabeculated regions of the right and left ventricles which grow from the primary heart tube, respectively. In this review, we describe regional pathology based on the relationship of these primitive ventricular components. We propose that the abnormal morphogenesis of one of these segments gives origin to regional ventricular pathology. For example, abnormal embryogenesis of the atrioventricular canal produces malformations of the atrioventricular junctions, such as double inlet ventricle, absence of one atrioventricular connection, and straddling and overriding atrioventricular valves. Similarly, abnormal morphogenesis of the primitive outlet segment gives rise to malformations of the subarterial region of each ventricle, along with the valves guarding these vessels. The principal anatomical features of these malformations of the ventricular inlets and outlets are described, and their possible morphogenesis is discussed. Due to the fact that the apical trabeculated region of each ventricle arises from a separate primitive segment, each ventricle can be identified according to the pattern of its apical trabeculations. This feature is crucial in the elucidation of complex congenital pathology, such as discordant atrioventricular connections.

scholarly journals MDCT angiography of emergent, non-traumatic, upper extremity vascular lesions

2020 ◽  
Vol 93 (1116) ◽  
pp. 20190731
Author(s):  
Sameer Ahmed ◽  
Megan H Lee ◽  
Hannah Ahn ◽  
Elliot K. Fishman
Keyword(s):  
Upper Extremity ◽  
Multidetector Ct ◽  
Vascular Malformations ◽  
Maximum Intensity Projection ◽  
Vascular Pathology ◽  
Vascular Lesions ◽  
Emergency Setting ◽  
Mdct Angiography ◽  
Non Invasive

Timely, accurate diagnosis of upper extremity vascular pathology is critical for successful clinical and surgical management. Although the vast majority of upper extremity vascular injury is due to trauma, physicians in the emergency setting, including radiologists, must be familiar with vascular lesions from iatrogenic injury, thromboembolic disease, vascular malformations, and vasculitis. Non-invasive diagnostic imaging with multidetector CT (MDCT) angiography is often employed in the emergency department to evaluate patients with suspected vascular pathology of the upper extremity. Maximum intensity projection and volume rendering technique are two methods that are useful for evaluating vasculature. In addition, dual-energy MDCT is useful in that it allows for the generation of iodine-selective images and bone subtracted images. These techniques can be used to create images that simulate catheter angiograms. In this article, we will discuss the role of MDCT angiography in the diagnosis and management of emergent non-traumatic vascular lesions of the upper extremity.

320-Row Multidetector CT Angiography in the Detection of Critical Cerebrovascular Anomalies

2016 ◽  
Vol 43 (4) ◽  
pp. 543-548
Author(s):  
Julien Hébert ◽  
Federico Roncarolo ◽  
Donatella Tampieri ◽  
Maria delPilar Cortes
Keyword(s):  
Digital Subtraction Angiography ◽  
Cerebral Angiography ◽  
Multidetector Ct ◽  
Unruptured Aneurysm ◽  
Vascular Pathology ◽  
Vascular Lesions ◽  
Digital Subtraction ◽  
Montreal Neurological Institute ◽  
Cerebrovascular Lesions ◽  
Quality Imaging

AbstractBackground: The acquisition of a new 320-row multidetector computed tomography angiography (CTA) scanner at the Montreal Neurological Institute and Hospital has provided higher quality imaging with less radiation exposure and shorter time of acquisition. However, its reliability has not been fully proven in critical vascular lesions when it comes to replacing a more invasive examination such as cerebral angiography. We wished to validate the accuracy of this equipment to investigate four common indications for patients to undergo conventional digital subtraction angiography: subarachnoid hemorrhage, vasospasm, unusual intracerebral hemorrhage, and unruptured aneurysm. Methods: Radiological reports and relevant imaging from 82 consecutive subjects who underwent a 320-row multidetector CTA followed by cerebral angiography from February 2010 to February 2014 were retrospectively analysed. A total of 102 cerebrovascular anomalies were found. Reports from both imaging modalities were compared to determine the diagnostic accuracy of CTA. Results: The overall sensitivity and specificity of 320-row multidetector CTA for detecting cerebrovascular abnormalities were, respectively, 97.60% and 63.20%. Similar results were obtained for all four categories of clinical indications. Conclusion: Results obtained from CTA were consistent with those obtained on digital subtraction angiography regardless of the vascular pathology. To our knowledge, this study is the first validating the accuracy of 320-row CTA in diagnosing critical cerebrovascular lesions.

X-RAY MICROANALYSIS USING THIN SECTIONS OF PRESERVATIVE-TREATED WOOD: Relationship of wood anatomical features to the distribution of copper

IAWA Journal ◽  
2004 ◽  
Vol 25 (1) ◽  
pp. 79-90 ◽  
Author(s):  
Hiroshi Matsunaga ◽  
Junji Matsumura ◽  
Kazuyuki Oda
Keyword(s):  
Secondary Wall ◽  
Chemical Constituents ◽  
Middle Lamella ◽  
Treated Wood ◽  
Japanese Cedar ◽  
Thin Sections ◽  
Anatomical Features ◽  
X Ray ◽  
Bordered Pits ◽  
Relationship Of

The objective of this study was to understand the micro-distribution of a copper-based preservative in wood in connection with anatomical morphology and to consider the fixation of copper in wood. Bulk specimens and semi-ultra thin sections (0.5 μm) obtained from Japanese cedar (Cryptomeria japonica) were treated with a CuAz preservative solution. After fixation of the solution in wood components, SEM-EDXA (Scanning Electron Microscope equipped with an Energy Dispersive X-ray Analyzer) was used to investigate the micro-distribution of copper. The use of semi-ultra thin sections improved characteristic X-ray spatial resolution and made it possible to analyze the micro-distribution of copper. In both earlywood and latewood of the sapwood, copper was more abundant in the compound middle lamella than in the secondary wall and concentrated in the tori. Copper was most concentrated as crystalline deposits in longitudinal parecnhyma cells. Semi-quantitative analysis revealed the copper amount to increase in this order: secondary wall in tracheids < middle lamellae < membrane of half-bordered pits < tori in tracheid pits < deposits in longitudinal parenchyma cells. These different concentrations may indicate significant interactions between the amine-copper complex in CuAz and chemical constituents of wood.

A longitudinal study examining the independence of apathy and depression after stroke: the Sydney Stroke Study

2010 ◽  
Vol 23 (2) ◽  
pp. 264-273 ◽  
Author(s):  
Adrienne Withall ◽  
Henry Brodaty ◽  
Annette Altendorf ◽  
Perminder S. Sachdev
Keyword(s):  
Vascular Pathology ◽  
Common Risk Factor ◽  
Stroke Study ◽  
Mri Scans ◽  
Neuropsychological Assessments ◽  
Dsm Iv ◽  
Magnetic Resonance Imaging Mri ◽  
Relationship Of ◽  
The Relationship

ABSTRACTBackground: There is growing recognition that apathy is not only a symptom of depression but may be an independent syndrome. This is the first study to investigate the relationship of apathy and depression longitudinally following stroke and to examine the association with dementia.Method: 106 consecutive eligible participants following stroke received extensive medical, psychiatric and neuropsychological assessments at three to six months (index assessment) and 15 months (follow-up assessment) after their stroke. A subset of participants received magnetic resonance imaging (MRI) scans at index assessment. Ratings were made for DSM-IV major or minor depression and for apathy using the Apathy Evaluation Scale (AES).Results: While there was no significant overlap between apathy and depression at index assessment (OR = 1.79, 95% CI 0.48, 6.66), the overlap was significant a year later (OR = 7.75, 95% CI 2.60, 23.13). Dementia at index assessment was a common risk factor for both apathy and depression at follow-up (OR = 12.45, 95% CI 2.98, 52.02 and OR = 10.35, 95% CI 2.84, 37.72, respectively).Conclusions: Apathy and depression after stroke have a common predictor and overlap longitudinally. The overlap might be due to cumulative vascular pathology and because of the relationship of each of these syndromes to dementia, which was an important, possibly causal, predictor for both.

Cardiac anatomy in the interventional era: an overview

ESC CardioMed ◽  
2018 ◽  
pp. 62-69
Author(s):  
Ammar M. Killu ◽  
Samuel J. Asirvatham
Keyword(s):  
Interventional Procedures ◽  
Cardiac Anatomy ◽  
Anatomical Features ◽  
Clinical Correlations ◽  
Relationship Of ◽  
The Relationship

In recent years, the number and the complexity of cardiac interventional procedures have grown tremendously. Therefore, in order to minimize the risk of complications, a better appreciation of cardiac anatomy is mandated. This chapter reviews the normal cardiac location and surrounding structures, and the relationship of the cardiac chambers and valves, in addition to the anatomical features of these regions. Furthermore, it provides clinical correlations where indicated.

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